Only copy layout param title if it is different from the current one.
Only copy layout param title if it is different from the current one.

Fixes WindowManager_LayoutParamsTest failure introduced in ag/866860

Bug: 27297744
Change-Id: I27ebf5d35b074d6b9c1634bc7cd18bba2844352e

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