PerformanceControl: minor layout tweaks

-show scrollbar outside of list
-reduce margin between items to show more

Change-Id: Ifcc2e9139dcc7a1e34b042748628edbbbd58638f
PerformanceControl: more cleanup and fixes

-persist filter states in wakelocks and time in state fragment
-someone removed the since boot entry in time in state :)
-handle no reset data case for time in state like for wakelocks
-there are wakelocks with uids without a package - add to android system
-allow 2 lines for wakelock names there are a lot of long ones

Change-Id: Ida9eb9819aa9b05c7565e8d8271334d5b5cc56ba