Merge "Dogfood the new IR Kotlin compiler backend." am: cf8b2ee16e am: ac0b51ec1d

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1515505

Change-Id: I7097ad6e65f5edda21068e5584fdbb436274171b

java/java.go

@@ -1446,6 +1446,9 @@ func (j *Module) compile(ctx android.ModuleContext, aaptSrcJar android.Path) {
 		kotlincFlags := j.properties.Kotlincflags
 		CheckKotlincFlags(ctx, kotlincFlags)
 
+		// Dogfood the JVM_IR backend.
+		kotlincFlags = append(kotlincFlags, "-Xuse-ir")
+
 		// If there are kotlin files, compile them first but pass all the kotlin and java files
 		// kotlinc will use the java files to resolve types referenced by the kotlin files, but
 		// won't emit any classes for them.