Update ViewLocationHolder#compareTo to properly implement Comparable

The previous implementation violates the transitive property, and
can lead to IllegalArgumentException being thrown.

See: https://code.google.com/p/android/issues/detail?id=55933
and bug 10791961.

Change-Id: I050e626aff9cc4b0ec5690a430d3bcb26f905425
1 file changed