9504c70f88
1. when an entry is pushed out of cache, it should be released if it is not in use by any thread. This didn't have to be done when cache was NOT LRU because the object either got into the cache while the caller had a reference to it or it didn't. if it didn't get into cache (because cache is full), the caller's close() released the object. But in LRU cache, an object could get pushed out of cache due to LRU policy and if it is NOT in use by any thread at the time it was pushed out of cache, then it got GC'ed - which caused warnings to be pronted in the log. 2. also delete some unused methods in SQLiteDatabase. Change-Id: I7831952647d3a057342bcc8ac186a6a26eb58f33