Fix for out of bounds exception in CachedAppOptimizer

The exception happens when cancelAllCompactions is called
since the size changed while iterating in the loop caused
by the inner cancelCompactionForProcess function. Changing
the iteration to a while loop fixes the issue until consumed
fixes the issue.

Bug: 242010026
Test: Manual
Change-Id: I92049ae3d06e403a37e69ee252ed993c89b6d9a7