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 (cherry picked from commit ea4dbac40a5e7491007170190e5f062f17900a4e) Merged-In:I5510ece72c2bc65d838d176f88a0ceaadb8faadb