Don't build hiddenapi flags or encode dex for unbundled builds

Builds with TARGET_BUILD_APPS shouldn't build the hiddenapi flags
or encode dex files even if frameworks/base exists.

Bug: 133343287
Test: mainline modules build
Change-Id: I0647451420fd09bb680808b35e1ad3b8f514ba46

java/java.go

@@ -1301,9 +1301,11 @@ func (j *Module) compile(ctx android.ModuleContext, aaptSrcJar android.Path) {
 			return
 		}
 
-		// Hidden API CSV generation and dex encoding
-		dexOutputFile = j.hiddenAPI.hiddenAPI(ctx, dexOutputFile, j.implementationJarFile,
-			j.deviceProperties.UncompressDex)
+		if !ctx.Config().UnbundledBuild() {
+			// Hidden API CSV generation and dex encoding
+			dexOutputFile = j.hiddenAPI.hiddenAPI(ctx, dexOutputFile, j.implementationJarFile,
+				j.deviceProperties.UncompressDex)
+		}
 
 		// merge dex jar with resources if necessary
 		if j.resourceJar != nil {