Fix a WebView scrolling regression - bug 2633572.
Fix a WebView scrolling regression - bug 2633572.

Update mLastTouchX/Y on every drag. This prevents the creation of
dead zones that the user has to drag back out of at the edges of
a document.

Change-Id: I348d96dfd3907dba7c6ddd86b678329d65063ba9

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