binder: Clang format the source code

Add a ".clang-format" file which is pretty close to the rest of
wpa_supplicant code base and reformat the binder codebase.

BUG: 29924006
Change-Id: Id0a2b3cdba19f538cc2bb7f00a1a28131730786c
Signed-off-by: Roshan Pius <rpius@google.com>
3 files changed