Calculate system image size at build, for harvesting later
Calculate system image size at build, for harvesting later

Change-Id: I6bfcde0e5df3f6da453f28354839e356f9191c0e

xorware/android_build,pranav01/platform_manifest,xorware/android_build,fallouttester/platform_manifest,see4ri/lolili,hagar006/platform_manifest,ND-3500/platform_manifest,RR-msm7x30/platform_manifest,xorware/android_build,knone1/platform_manifest,xorware/android_build,Hybrid-Power/startsync,xorware/android_build