Check for spanned before computing tab stops
Check for spanned before computing tab stops

Don't try to check for tab stop spans in non-Spanned text input.

Change-Id: I54d69c8e0246f5a38d0713a89b8b455a478285f0

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