logd: Add support for *.logd.filter

(cherry pick from commit 932f7acc)

- Add device (ro.logd.filter), persistent (persist.logd.filter)
  properties to control the default filters
- Allow logcat -P default to produce expected results
- Allow logcat -P disable to produce expected results

Change-Id: I651cb705373ec1e88a99e4b9086da4f9668a468a