[1/2] base: add CPU info overlay

this shows
CPU temp (if available)
for every core governor + online + freq

PS3:
increased font size

PS4:
whitespace cleanup

PS5:
more of that :(

Change-Id: I8e2fd81edd8499eea2b1a6de8c042938387b33ef
Merge "[1/2] base: add CPU info overlay" into android-4.3