Revert "Prevent onImageAvailable from being called on stale listeners"

This reverts commit 666ad3a9ac1492744256e86ada9617a897c0b799.

Reason for revert: This CL breaks Google Translate
Bug: 217847856

Change-Id: I5510ece72c2bc65d838d176f88a0ceaadb8faadb
1 file changed