Another step to using gn_to_bp.py

Another step to using gn_to_bp.py

Remove the tests for gyp_to_android.py, which is going away anyway.
With a .bp file in the Android source tree, the Android build system
attempts and fails to build them.

Do not attempt to run the deleted tests.

Change-Id: Idfecd79917bf6e6d70b601bf36b0f1bdf69c90b6
Reviewed-on: https://skia-review.googlesource.com/6112
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Leon Scroggins <scroggo@google.com>