Set targetsdkversion to future level if TARGET_BUILD_APPS is not empty

manifest_fixer transforms an AndroidManifest.xml file for use in aapt2.
For TARGET_BUILD_APPS builds, set targetSdkVersion to a FutureApiLevel

Test: In build/soong, go test ./java
Test: TH

Test: In internal, TARGET_BUILD_APPS=xyz m
out/soong/.intermediates/packages/providers/MediaProvider/MediaProvider/android_common_MediaProviderGoogle_apex30/package-res.apk
&& aapt2 dump badging
out/soong/.intermediates/packages/providers/MediaProvider/MediaProvider/android_common_MediaProviderGoogle_apex30/package-res.apk
| grep targetSdkVersion # targetSdkVersion:'10000'

Test: In internal, m
out/soong/.intermediates/packages/providers/MediaProvider/MediaProvider/android_common_MediaProviderGoogle_apex30/package-res.apk
&& aapt2 dump badging
out/soong/.intermediates/packages/providers/MediaProvider/MediaProvider/android_common_MediaProviderGoogle_apex30/package-res.apk
| grep targetSdkVersion # targetSdkVersion:'Tiramisu'

Bug: 204107787

Change-Id: Ic6f21111d5a8c61ae789a7a3a001f669257a39b2
diff --git a/java/android_manifest.go b/java/android_manifest.go
index 38065f1..3a1f5fc 100644
--- a/java/android_manifest.go
+++ b/java/android_manifest.go
@@ -16,6 +16,7 @@
 
 import (
 	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/google/blueprint"
@@ -42,6 +43,20 @@
 	},
 	"args", "libs")
 
+// targetSdkVersion for manifest_fixer
+// When TARGET_BUILD_APPS is not empty, this method returns the unreleased(future) API level
+// This enables release builds (that run with TARGET_BUILD_APPS=[val...]) to target APIs that have not yet been finalized as part of an SDK
+func targetSdkVersionForManifestFixer(ctx android.ModuleContext, sdkContext android.SdkContext) string {
+	if ctx.Config().UnbundledBuildApps() {
+		return strconv.Itoa(android.FutureApiLevel.FinalOrFutureInt())
+	}
+	targetSdkVersion, err := sdkContext.TargetSdkVersion(ctx).EffectiveVersionString(ctx)
+	if err != nil {
+		ctx.ModuleErrorf("invalid targetSdkVersion: %s", err)
+	}
+	return targetSdkVersion
+}
+
 // Uses manifest_fixer.py to inject minSdkVersion, etc. into an AndroidManifest.xml
 func manifestFixer(ctx android.ModuleContext, manifest android.Path, sdkContext android.SdkContext,
 	classLoaderContexts dexpreopt.ClassLoaderContextMap, isLibrary, useEmbeddedNativeLibs, usesNonSdkApis,
@@ -89,10 +104,7 @@
 		args = append(args, "--logging-parent", loggingParent)
 	}
 	var deps android.Paths
-	targetSdkVersion, err := sdkContext.TargetSdkVersion(ctx).EffectiveVersionString(ctx)
-	if err != nil {
-		ctx.ModuleErrorf("invalid targetSdkVersion: %s", err)
-	}
+	targetSdkVersion := targetSdkVersionForManifestFixer(ctx, sdkContext)
 	if UseApiFingerprint(ctx) && ctx.ModuleName() != "framework-res" {
 		targetSdkVersion = ctx.Config().PlatformSdkCodename() + fmt.Sprintf(".$$(cat %s)", ApiFingerprintPath(ctx).String())
 		deps = append(deps, ApiFingerprintPath(ctx))