Fix override_android_app dependency issues.

This change fixes an issue where an android_test could not depened on an
override_android_app or an android_app overridden by one by moving all
override processing to post-deps and forwarding incoming dependencies on
override_android_apps to base android_app modules

Fixes: 132447700
Test: app_test.go
Change-Id: I4ac593be661f541f5ea9823ef97373bee4b186f9

java/app.go

@@ -163,7 +163,9 @@ func (a *AndroidApp) DepsMutator(ctx android.BottomUpMutatorContext) {
 		}
 		ctx.AddFarVariationDependencies(variation, tag, a.appProperties.Jni_libs...)
 	}
+}
 
+func (a *AndroidApp) OverridablePropertiesDepsMutator(ctx android.BottomUpMutatorContext) {
 	cert := android.SrcIsModule(a.getCertString(ctx))
 	if cert != "" {
 		ctx.AddDependency(ctx.Module(), certificateTag, cert)
@@ -632,7 +634,7 @@ func OverrideAndroidAppModuleFactory() android.Module {
 	m := &OverrideAndroidApp{}
 	m.AddProperties(&overridableAppProperties{})
 
-	android.InitAndroidModule(m)
+	android.InitAndroidMultiTargetsArchModule(m, android.DeviceSupported, android.MultilibCommon)
 	android.InitOverrideModule(m)
 	return m
 }