Add default .clang-format

Adds a default .clang-format for frameworks/native. If this style is
undesirable for a given component in this repo, it can be overriden
with a more local .clang-format file.

Test: None necessary, only for formatting
Change-Id: I0bf6bd9a15255d9a4ce3d485e841912955caa310
1 file changed