PerformanceControl: fix disc display for sdcard(s)

The regex was derped

Change-Id: I1675ba74dc30e84517024e3452c21bbfab1140b3
PerformanceControl: rework time in stats fragment

-support overall stats (need kernels support https://gerrit.omnirom.org/9005)
-enable refresh/reset/restore support
-added active time stat filter

PS4
-added share action
-reset saved offsets on boot

Change-Id: I4255457c382a724ccb5774714ce52dcab924ccbf
Merge branch 'kk' of github.com:CarbonDev/android_packages_apps_PerformanceControl into kk

Merged changes from upstream