docs: Fixed minor issue with Studio shortcuts
docs: Fixed minor issue with Studio shortcuts

See https://code.google.com/p/android/issues/detail?id=74316
Updated keymap for new files and added note on choosing keymaps.

Change-Id: I3c1e1a8ab0f344040ea2627734f7d5959c842799

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