Clear All button added in Recent Panelview.

Ref: https://github.com/temasek/android_frameworks_base/commit/a129580ee886b48c124de716236c2bae2b93a77b

Change-Id: I3547ec5bad197229f6d466e07099cdf9a321c092

Add Memory Indicator

Change-Id: Icf31f19dcd25a848949edc2f9d8510bccebce62f