Update google-java-format-diff.py to v1.15.0

Bug: 254537505
Test: TH
Change-Id: Iea7f2b845dba8075f3b5e9539d5de6a90ada7103
(cherry picked from commit 6a42b79299fb5af2a63cd8e75c1327f37c4bfe5a)
Merged-In: Iea7f2b845dba8075f3b5e9539d5de6a90ada7103
1 file changed