Revert "[base] Migrate deprecated GrBackendSemaphore methods"

This reverts commit bcb613c8ca8f2ef2754423407fefbb572a518d5b.

Reason for revert: Droid-monitored triggered revert due to b/328489884. Will be verifying through ABTD before submitting the revert.

Change-Id: I866b19f0b7427dfdb3e6f5ecb0096df9c8d6c8ad
1 file changed