ub-launcher3-master should track R sdk

Bug: 140771636
Test: manual
Change-Id: I459ab29f436867ad8ac3c22efadb43ec42f8a572
diff --git a/gradle.properties b/gradle.properties
index 5b90f08..a77f52a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -10,4 +10,4 @@
 PROTOBUF_DEPENDENCY=com.google.protobuf.nano:protobuf-javanano:3.0.0-alpha-7
 
 BUILD_TOOLS_VERSION=28.0.3
-COMPILE_SDK=android-Q
\ No newline at end of file
+COMPILE_SDK=android-R