GC triggering performance optimizations

Copy the correct starting heap size at process init.
Interfaces to set GC/managed heap parameters.

Change-Id: I0154d1523c3cfdb1214ed0315193cbb24704351f
Changed defaults

Change-Id: Ic6511450ead12d54c250964eebc52534e2248500
SystemUI: New adb over network icons

Preview: http://goo.gl/3Othlu

Change-Id: I88c17ac2b909c6b12cf2fd693d31688343de1209
Set defaults

Change-Id: I0878617043b0bd6fa54ebdd80dae712c4d2b71ca