Merge "Revert "Revert "Add ExternalTexture class into RenderEngine inte..."" into sc-dev am: a3a235f5 am: 31b07638

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/14212861

Change-Id: I0b890932db58a80a6e8095bca200c5d6238a5304