gfxstream-protocols: use bash instead of shell script am: 294d7397ff am: a7b25e5d21

Original change: https://android-review.googlesource.com/c/platform/external/gfxstream-protocols/+/2260367

Change-Id: I4050895b1704b2e77724f37e2f96c47d5c925668
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>