Bump stable version to v0.19.0 (#10438)

GitOrigin-RevId: faecc7aa6242d3cb547495634a90d14b7994c1db

Author: temap

gradle.properties

@@ -1,5 +1,5 @@
 VERSION_NAME=11.20.0-SNAPSHOT-02-23--05-00.git-e61553b
-LAST_STABLE_VERSION=11.19.0-rc.1
+LAST_STABLE_VERSION=11.19.0
 # version name for the test app
 TEST_APP_VERSION_NAME=0.1.0