am 4a84a13e: am a5f534df: use frozensets to represent APK cert sets
am 4a84a13e: am a5f534df: use frozensets to represent APK cert sets

* commit '4a84a13e7ce65f24bcadb8d331023b6415d7867e':
  use frozensets to represent APK cert sets

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