Faster `find` for bazel-out in mixed_*
Don't have `find` list *everything* under `out/` and then grep.
Instead, leverage `find`'s options.
Test: TBD?
Change-Id: Idf4b2ecfdcd978edb45b00216b7886909188884e
The code in this directory is experimental. Bazel support for Android Platform is undergoing active development and workflow stability is currently not guaranteed.