Optimize: Use measureText instead of doLayout.
Optimize: Use measureText instead of doLayout.

measureText is a light weight method dedicated to measure text width.
With this CL, breakText, doRunAdvance and doOffsetForAdvance use
measureText.

Bug: 24505153

Change-Id: Ibd62de2e0fe2e196cf07472f2270cc8c6325daab

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