apex: drop `java_import` support

java_import doesn't support dex jar which is necessary to be packaged in
an APEX. Supporting this would require non-trivial work. By the way
java_import is not used and there is a workaround.(defining java_library
and static-linking with it)

We drop the support for `java_import` in APEX.

Bug: 139175488
Test: m (soong tests amended)
Change-Id: I924386571079090c701276d87f665ce7fbb6f074
diff --git a/apex/apex_test.go b/apex/apex_test.go
index 4236ca6..97600b6 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -372,7 +372,7 @@
 					binaries: ["foo",],
 				}
 			},
-			java_libs: ["myjar", "myprebuiltjar"],
+			java_libs: ["myjar"],
 		}
 
 		apex {
@@ -447,12 +447,6 @@
 			system_modules: "none",
 			compile_dex: true,
 		}
-
-		java_import {
-			name: "myprebuiltjar",
-			jars: ["prebuilt.jar"],
-			installable: true,
-		}
 	`)
 
 	apexRule := ctx.ModuleForTests("myapex", "android_common_myapex_image").Rule("apexRule")
@@ -470,7 +464,6 @@
 	// Ensure that apex variant is created for the direct dep
 	ensureListContains(t, ctx.ModuleVariantsForTests("mylib"), "android_arm64_armv8-a_shared_myapex")
 	ensureListContains(t, ctx.ModuleVariantsForTests("myjar"), "android_common_myapex")
-	ensureListContains(t, ctx.ModuleVariantsForTests("myprebuiltjar"), "android_common_myapex")
 
 	// Ensure that apex variant is created for the indirect dep
 	ensureListContains(t, ctx.ModuleVariantsForTests("mylib2"), "android_arm64_armv8-a_shared_myapex")
@@ -480,7 +473,6 @@
 	ensureContains(t, copyCmds, "image.apex/lib64/mylib.so")
 	ensureContains(t, copyCmds, "image.apex/lib64/mylib2.so")
 	ensureContains(t, copyCmds, "image.apex/javalib/myjar.jar")
-	ensureContains(t, copyCmds, "image.apex/javalib/myprebuiltjar.jar")
 	// .. but not for java libs
 	ensureNotContains(t, copyCmds, "image.apex/javalib/myotherjar.jar")
 
@@ -489,7 +481,6 @@
 	ensureListContains(t, ctx.ModuleVariantsForTests("mylib2"), "android_arm64_armv8-a_shared")
 	ensureListContains(t, ctx.ModuleVariantsForTests("myjar"), "android_common")
 	ensureListContains(t, ctx.ModuleVariantsForTests("myotherjar"), "android_common")
-	ensureListContains(t, ctx.ModuleVariantsForTests("myprebuiltjar"), "android_common")
 
 	// Ensure that all symlinks are present.
 	found_foo_link_64 := false