Allow each APEX to provide its own AndroidManifest

AndroidManifest.xml file can be specified via the 'androidManifest'
property in the apex module type. It can be used to have a custom
AndroidManifest.xml that have additional tags (such as <uses-sdk> or
<uses-feature>) for precise targeting.

The property is optional; if unspecified, then one is auto-generated as
before.

Bug: 123857186
Test: m apex_test_build_features
Change-Id: Id7ee0471661887cfa11124cbaa3beea8cffcdda4

apex/apex.go

@@ -212,6 +212,10 @@ type apexBundleProperties struct {
 	// "apex_manifest.json"
 	Manifest *string
 
+	// AndroidManifest.xml file used for the zip container of this APEX bundle.
+	// If unspecified, a default one is automatically generated.
+	AndroidManifest *string
+
 	// Determines the file contexts file for setting security context to each file in this APEX bundle.
 	// Specifically, when this is set to <value>, /system/sepolicy/apex/<value>_file_contexts file is
 	// used.
@@ -901,6 +905,12 @@ func (a *apexBundle) buildUnflattenedApex(ctx android.ModuleContext, keyFile and
 			optFlags = append(optFlags, "--override_apk_package_name "+manifestPackageName)
 		}
 
+		if a.properties.AndroidManifest != nil {
+			androidManifestFile := android.PathForModuleSrc(ctx, proptools.String(a.properties.AndroidManifest))
+			implicitInputs = append(implicitInputs, androidManifestFile)
+			optFlags = append(optFlags, "--android_manifest "+androidManifestFile.String())
+		}
+
 		ctx.Build(pctx, android.BuildParams{
 			Rule:        apexRule,
 			Implicits:   implicitInputs,