Improve privacy dashboard live data

improve privacy dashboard live data performace, we
are working on new implementation to fix OOM and
ANR issue completely. Improving the current code
could be helpful, just in case we need to fall back.

Bug: 300269033
Test: manual
Test: gts-tradefed run gts-dev -m GtsPermissionUiTestCases
Change-Id: I3188f8e209ec5e9d8b8c1dfe8064e99a317fbc7e