Fix small bug with TaskView tile expansion

There was a small typo that resulted in the wrong measurement being returned for the remaining TaskView. This CL fixes it.

Fixes: 365476600
Test: Manual
Flag: NONE bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:21f504e0f14f0d3b983bf6694eeda8fc7bedda34)
Merged-In: I1abf993abcaa8d06e5475f31c0322017f6e96e6f
Change-Id: I1abf993abcaa8d06e5475f31c0322017f6e96e6f