Framework: Bring Long press back kill app toast back

It is now supported thanks to pawitp commiting the context fix for
displaying framework toasts

Change-Id: I8ab1beb49fc3b61355de8bc207482e2f51ff3e2a
Lockscreen VolCtrls : Don't raise volume on skipTrack

Set mIsLongPress to true when longpress was successful to avoid
volume from being changed on release

Change-Id: I874f7d66248e30535dddfec53ddd299718e3fa3d