AI 147225: am: CL 147224 am: CL 147219 update app-signing doc to include a guide to export a signed APK from ADT   Original author: smain   Merged from: //branches/cupcake/...   Original author: android-build
AI 147225: am: CL 147224 am: CL 147219 update app-signing doc to include a guide to export a signed APK from ADT
  Original author: smain
  Merged from: //branches/cupcake/...
  Original author: android-build

Automated import of CL 147225

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base