Update JavaDoc of EditorInfo#packageName.
Update JavaDoc of EditorInfo#packageName.

This CL does nothing but updates JavaDoc of EditorInfo#packageName
about the changes made in M.

Bug: 18931038
Change-Id: I8c94f6470d77e22daabb7caa0ea57e85e51b3ec5

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