Enforce min_sdk_version of apex(use_vendor:true)

Even though use_vendor:true is prohibited, there is media.swcodec apex
which is still use_vendor: true and also needs to support Android10.
(min_sdk_version: 29)

Because LLNDK stubs were provided only for the current VNDK version,
media.swcodec couldn't be built against min_sdk_version: 29.

This change introduces additional versions for LLNDK stubs which are
enforced when an apex with use_vendor: true sets min_sdk_version.

To make things easier, the versions of LLNDK stubs are borrowed from its
implementation libraries.

Bug: 147450930
Bug: 149591522
Test: TARGET_BUILD_APPS=com.android.media.swcodec m
      (with min_sdk_version: 29 set)
      check if liblog/libc/libm/libdl stubs are 29
      check if 29 stubs don't have new symbols.

Merged-In: I79946cbb4da6617138a96d2b254349d3a298e77b
Change-Id: I79946cbb4da6617138a96d2b254349d3a298e77b
(cherry picked from commit 380fc3615cf8c837e25dd7c480f8ce579ffd5d90)
diff --git a/apex/apex_test.go b/apex/apex_test.go
index b7ec056..cde80c1 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -848,58 +848,89 @@
 
 }
 
-func TestApexDependencyToLLNDK(t *testing.T) {
-	ctx, _ := testApex(t, `
-		apex {
-			name: "myapex",
-			key: "myapex.key",
-			use_vendor: true,
-			native_shared_libs: ["mylib"],
-		}
+func TestApexDependsOnLLNDKTransitively(t *testing.T) {
+	testcases := []struct {
+		name          string
+		minSdkVersion string
+		shouldLink    string
+		shouldNotLink []string
+	}{
+		{
+			name:          "should link to test latest",
+			minSdkVersion: "current",
+			shouldLink:    "30",
+			shouldNotLink: []string{"29"},
+		},
+		{
+			name:          "should link to llndk#29",
+			minSdkVersion: "29",
+			shouldLink:    "29",
+			shouldNotLink: []string{"30"},
+		},
+	}
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			ctx, _ := testApex(t, `
+			apex {
+				name: "myapex",
+				key: "myapex.key",
+				use_vendor: true,
+				native_shared_libs: ["mylib"],
+				min_sdk_version: "`+tc.minSdkVersion+`",
+			}
 
-		apex_key {
-			name: "myapex.key",
-			public_key: "testkey.avbpubkey",
-			private_key: "testkey.pem",
-		}
+			apex_key {
+				name: "myapex.key",
+				public_key: "testkey.avbpubkey",
+				private_key: "testkey.pem",
+			}
 
-		cc_library {
-			name: "mylib",
-			srcs: ["mylib.cpp"],
-			vendor_available: true,
-			shared_libs: ["libbar"],
-			system_shared_libs: [],
-			stl: "none",
-			apex_available: [ "myapex" ],
-		}
+			cc_library {
+				name: "mylib",
+				srcs: ["mylib.cpp"],
+				vendor_available: true,
+				shared_libs: ["libbar"],
+				system_shared_libs: [],
+				stl: "none",
+				apex_available: [ "myapex" ],
+			}
 
-		cc_library {
-			name: "libbar",
-			srcs: ["mylib.cpp"],
-			system_shared_libs: [],
-			stl: "none",
-		}
+			cc_library {
+				name: "libbar",
+				srcs: ["mylib.cpp"],
+				system_shared_libs: [],
+				stl: "none",
+				stubs: { versions: ["29","30"] },
+			}
 
-		llndk_library {
-			name: "libbar",
-			symbol_file: "",
-		}
-	`, func(fs map[string][]byte, config android.Config) {
-		setUseVendorWhitelistForTest(config, []string{"myapex"})
-	})
+			llndk_library {
+				name: "libbar",
+				symbol_file: "",
+			}
+			`, func(fs map[string][]byte, config android.Config) {
+				setUseVendorWhitelistForTest(config, []string{"myapex"})
+			}, withUnbundledBuild)
 
-	apexRule := ctx.ModuleForTests("myapex", "android_common_myapex_image").Rule("apexRule")
-	copyCmds := apexRule.Args["copy_commands"]
+			// Ensure that LLNDK dep is not included
+			ensureExactContents(t, ctx, "myapex", "android_common_myapex_image", []string{
+				"lib64/mylib.so",
+			})
 
-	// Ensure that LLNDK dep is not included
-	ensureNotContains(t, copyCmds, "image.apex/lib64/libbar.so")
+			// Ensure that LLNDK dep is required
+			apexManifestRule := ctx.ModuleForTests("myapex", "android_common_myapex_image").Rule("apexManifestRule")
+			ensureListEmpty(t, names(apexManifestRule.Args["provideNativeLibs"]))
+			ensureListContains(t, names(apexManifestRule.Args["requireNativeLibs"]), "libbar.so")
 
-	apexManifestRule := ctx.ModuleForTests("myapex", "android_common_myapex_image").Rule("apexManifestRule")
-	ensureListEmpty(t, names(apexManifestRule.Args["provideNativeLibs"]))
+			mylibLdFlags := ctx.ModuleForTests("mylib", "android_vendor.VER_arm64_armv8-a_shared_myapex").Rule("ld").Args["libFlags"]
+			ensureContains(t, mylibLdFlags, "libbar.llndk/android_vendor.VER_arm64_armv8-a_shared_"+tc.shouldLink+"/libbar.so")
+			for _, ver := range tc.shouldNotLink {
+				ensureNotContains(t, mylibLdFlags, "libbar.llndk/android_vendor.VER_arm64_armv8-a_shared_"+ver+"/libbar.so")
+			}
 
-	// Ensure that LLNDK dep is required
-	ensureListContains(t, names(apexManifestRule.Args["requireNativeLibs"]), "libbar.so")
-
+			mylibCFlags := ctx.ModuleForTests("mylib", "android_vendor.VER_arm64_armv8-a_static_myapex").Rule("cc").Args["cFlags"]
+			ensureContains(t, mylibCFlags, "__LIBBAR_API__="+tc.shouldLink)
+		})
+	}
 }
 
 func TestApexWithSystemLibsStubs(t *testing.T) {
@@ -1229,10 +1260,6 @@
 	// note that platform variant is not.
 	cm = ctx.ModuleForTests("libc++", "android_arm64_armv8-a_shared").Module().(*cc.Module)
 	ensureListNotContains(t, cm.Properties.AndroidMkStaticLibs, "libgcc_stripped")
-
-	libFlags := ctx.ModuleForTests("libx", "android_arm64_armv8-a_shared_myapex").Rule("ld").Args["libFlags"]
-	ensureContains(t, libFlags, "android_arm64_armv8-a_shared_myapex/libc++.so")
-	ensureContains(t, libFlags, "android_arm64_armv8-a_shared_29/libc.so") // min_sdk_version applied
 }
 
 func TestInvalidMinSdkVersion(t *testing.T) {