Add support for JNI libraries to android_app modules

Make android_app modules a MultiTargets module, which means the
common variant will have a list of Targets that it needs to handle.
Collect JNI libraries for each Target, and package them into or
alongside the APK.

Bug: 80095087
Test: app_test.go
Change-Id: Iabd3921e1d4c4b4cfcc7e131a0b0d9ab83b0ebbb

java/java.go

@@ -95,9 +95,6 @@ type CompilerProperties struct {
 	// list of java libraries that will be compiled into the resulting jar
 	Static_libs []string `android:"arch_variant"`
 
-	// list of native libraries that will be provided in or alongside the resulting jar
-	Jni_libs []string `android:"arch_variant"`
-
 	// manifest file to be included in resulting jar
 	Manifest *string
 
@@ -365,6 +362,11 @@ type dependencyTag struct {
 	name string
 }
 
+type jniDependencyTag struct {
+	blueprint.BaseDependencyTag
+	target android.Target
+}
+
 var (
 	staticLibTag     = dependencyTag{name: "staticlib"}
 	libTag           = dependencyTag{name: "javalib"}
@@ -389,6 +391,12 @@ type sdkDep struct {
 	aidl android.Path
 }
 
+type jniLib struct {
+	name   string
+	path   android.Path
+	target android.Target
+}
+
 func (j *Module) shouldInstrument(ctx android.BaseContext) bool {
 	return j.properties.Instrument && ctx.Config().IsEnvTrue("EMMA_INSTRUMENT")
 }
@@ -597,6 +605,7 @@ func (j *Module) deps(ctx android.BottomUpMutatorContext) {
 	ctx.AddFarVariationDependencies([]blueprint.Variation{
 		{Mutator: "arch", Variation: ctx.Config().BuildOsCommonVariant},
 	}, annoTag, j.properties.Annotation_processors...)
+
 	android.ExtractSourcesDeps(ctx, j.properties.Srcs)
 	android.ExtractSourcesDeps(ctx, j.properties.Exclude_srcs)
 	android.ExtractSourcesDeps(ctx, j.properties.Java_resources)
@@ -787,6 +796,11 @@ func (j *Module) collectDeps(ctx android.ModuleContext) deps {
 		otherName := ctx.OtherModuleName(module)
 		tag := ctx.OtherModuleDependencyTag(module)
 
+		if _, ok := tag.(*jniDependencyTag); ok {
+			// Handled by AndroidApp.collectJniDeps
+			return
+		}
+
 		if to, ok := module.(*Library); ok {
 			switch tag {
 			case bootClasspathTag, libTag, staticLibTag: