Update stable version

GitOrigin-RevId: f55a3df96e6b15137e93f043641f1e2d83484a4b

Author: Kylmakalle

gradle.properties

@@ -1,5 +1,5 @@
 VERSION_NAME=11.20.0-SNAPSHOT-01-29--04-49.git-7f15b24
-LAST_STABLE_VERSION=11.18.0
+LAST_STABLE_VERSION=11.19.0-beta.1
 # version name for the test app
 TEST_APP_VERSION_NAME=0.1.0