Fix typos in android.widget package docs.
Fix typos in android.widget package docs.

Fixed spelling errors and cleaned up markup.

Change-Id: I3573087d40bbeb3906a8361abb02de4cb4325a92

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