Android: Update clang-format to follow Google style guide

BUG=webrtc:6419
NOTRY=True

Review-Url: https://codereview.webrtc.org/2368963002
Cr-Commit-Position: refs/heads/master@{#14385}
diff --git a/.clang-format b/.clang-format
index 0a89601..59d4870 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,3 +1,6 @@
 # Defines the Chromium style for automatic reformatting.
 # http://clang.llvm.org/docs/ClangFormatStyleOptions.html
 BasedOnStyle: Chromium
+---
+Language: Java
+BasedOnStyle: Google