No developers here, only badasses

Change-Id: Ie18c94a505614af9cc83ab8749ec8f847e683fa8
Allow enabling/disabling DexOpt /system to /cache
Credit to @MWisBest

Change-Id: I838792e3cf79268ef20d37daaf2cb35acf391cbe
[2/2] Settings: Headset plug: Disable if music is active

PS8:
-added summary

PS9:
-added category already here

Change-Id: I61d78f76c45a38028a99a888546e550395090491