Fix package path of android/soong/android pctx

android/soong/common was renamed to android/soong/android long
ago, but the pctx package path was still "android/soong/common".
This required all users of rules defined in android/soong/android
to import "android/soong/android" and then
pctx.Import("android/soong/common").

Test: m checkbuild
Change-Id: I20d096522760538f7cfc2bec3d4bfeba99b275d4
diff --git a/cc/ndk_sysroot.go b/cc/ndk_sysroot.go
index 9265bff..e39bae5 100644
--- a/cc/ndk_sysroot.go
+++ b/cc/ndk_sysroot.go
@@ -63,7 +63,7 @@
 	android.RegisterModuleType("preprocessed_ndk_headers", preprocessedNdkHeadersFactory)
 	android.RegisterSingletonType("ndk", NdkSingleton)
 
-	pctx.Import("android/soong/common")
+	pctx.Import("android/soong/android")
 }
 
 func getNdkInstallBase(ctx android.PathContext) android.OutputPath {