Common fixes, cleanupp

PS2: Missing import
PS3: Additional cleanup, Use ab drawable instead
PS4: Remove saving options on NavRing
PS5: Cleanup

Change-Id: I5d041cf27789b175f39d89ecb3f89541e3f88ecc
Merge "Common fixes, cleanupp" into jb3
Fix lockring, navring, and device tunables fc

Derps from common fixes commit that was merged yesterday

Change-Id: Ia47c6f354e1b8d3fac54f20fa45954f935901111
Move LCD density to Interface -> General tab

I dont think this feature needs its own tab. Less tabs, less clutter.

Change-Id: I8488f3cdfa8f9915bc8ae4f1d7c20b5e21b795b3
PA PIE (2/2)

Change-Id: Id257923fc0f4eb6855bbc1c157368dc7bc576f6c
Merge branch 'Carbon' into jb3