Handle non DynamicLayout in Editable draw method.
Handle non DynamicLayout in Editable draw method.

An Editable text will use a BoringLayout when the text is empty.
Fallback on the regular layout draw text method when the layout
does not support the block optimisation.

Change-Id: Ie4bdb4381f2f58b71d7c35b2f5734e544e3115ea

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