Rework slow-query log

- Allow per-uid slow query log with "db.log.slow_query_threshold.UID"
- Add db.log.bindargs to enable bind args log in slow query log
 (debuggable build only)

Bug: 111210683
Test: setprop db.log.slow_query_threshold 0 -> slow query log enabled for all processes
Test: setprop db.log.slow_query_threshold.ACORE-UID 0 -> slow query log enabled for acore
Test: setprop db.log.bindargs 1  + setprop db.log.slow_query_threshold.ACORE-UID 0 + kill acore ->
  Bind args also logged

Change-Id: I3e85479e0c946308837b827f856016bc4fbe1ea3