SQLite app ops optimize evict methods

Refactor evict() & evict(opCode) into one method,
Also optimize evict() when there is no event to evict,
in earlier method we were creating a copy of cache.

Bug: 377584611
Flag: EXEMPT bug fix
Test: presubmit
Change-Id: Ib1c85e238e49ad42a43b4771566e4b5469dca8b2