Prepare tools/r8_release.py for branch 9.4

Change-Id: I312770f71556fd2cd8c3ae8ee23540d977619ad6

tools/r8_release.py

diff --git a/tools/r8_release.py b/tools/r8_release.py
index 2d33303..33999db 100755
--- a/tools/r8_release.py
+++ b/tools/r8_release.py
@@ -18,7 +18,7 @@
 import git_utils
 import utils
 
-R8_DEV_BRANCH = '9.3'
+R8_DEV_BRANCH = '9.4'
 R8_VERSION_FILE = os.path.join('src', 'main', 'java', 'com', 'android', 'tools',
                                'r8', 'Version.java')
 THIS_FILE_RELATIVE = os.path.join('tools', 'r8_release.py')