Add resources and build files required to build CtsSkQPTestCases

The resources and build files were updated with the following
sequence. Subsequent merges from upstream skqp branches should
preform these steps as part of the merge process.

  python tools/skqp/gn_to_bp.py
  python tools/skqp/download_model
  python tools/skqp/setup_resources

Additionally the following one time step were performed.
  1) Added MODULE_LICENSE_BSD file
  2) Added empty SkUserConfigManual
  3) Added Android.mk and AndroidTest.xml for CtsSkQPTestCases
  4) Deleted .gitignore in the assets directory

Bug: 74442448
Change-Id: If247adcca136daa43ed574eb19dfe1fd30f0f6c1
1475 files changed