Allow modules to override FORCE_AAPT2=true with LOCAL_USE_AAPT2 := false

Bug: 79481102
Test: m java FORCE_AAPT2=true
Change-Id: Iece2158dc887a249eb51086b2497b170b5879979
diff --git a/core/force_aapt2.mk b/core/force_aapt2.mk
index 655ccf5..41bf710 100644
--- a/core/force_aapt2.mk
+++ b/core/force_aapt2.mk
@@ -18,7 +18,7 @@
 # rewriting some properties to convert standard AAPT usage to AAPT2.
 
 ifeq ($(FORCE_AAPT2),true)
-  ifneq ($(LOCAL_USE_AAPT2),true)
+  ifeq ($(LOCAL_USE_AAPT2),)
     # Force AAPT2 on
     LOCAL_USE_AAPT2 := true
     # Move LOCAL_STATIC_JAVA_AAR_LIBRARIES to LOCAL_STATIC_ANDROID_LIBRARIES