use maps-android stable field for last stable version (#5574)

GitOrigin-RevId: 2236465b9442d459160eea8d126fedc6a1395b2b

Author: natiginfo

gradle.properties

@@ -1,5 +1,5 @@
 VERSION_NAME=11.15.0-SNAPSHOT-08-01--04-40.git-1471842
-LAST_STABLE_VERSION=11.13.1
+LAST_STABLE_VERSION=11.14.0
 # version name for the test app
 TEST_APP_VERSION_NAME=0.1.0