clarify dp dimension description
clarify dp dimension description

Change-Id: I85152f8ab668984ca9db3a4f56c4f8a5ab6ebacd

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