AI 146710: Splitting android.core.tests.apk into several smaller   apks. Each libcore module gets one apk and luni gets 4.   BUG=1789657
AI 146710: Splitting android.core.tests.apk into several smaller
  apks. Each libcore module gets one apk and luni gets 4.
  BUG=1789657

Automated import of CL 146710

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