Bump Android Gradle version files to  3.4 Final

Bug: 127817550
Change-Id: I1cb8b1e04aa12ecae2c983c4ff5b5f851ca2f2f5
(cherry picked from commit f298a9ad3d859e38be24cb871e8d587f7bedf3bb)
diff --git a/base/version.properties b/base/version.properties
index 80ba434..7e152d9 100644
--- a/base/version.properties
+++ b/base/version.properties
@@ -3,8 +3,8 @@
 # This file is read by gradle build scripts, but also packaged with builder and
 # builder-model as a resource, for Version classes to read.
 
-baseVersion = 26.4.0-rc03
-buildVersion = 3.4.0-rc03
+baseVersion = 26.4.0
+buildVersion = 3.4.0
 
 # This counter should be incremented every time the api is changed in not backward-compatible way,
 # i.e. it should be incremented from N to N+1 only when the api is changed in a way that existing