Update MaximizeModeController Hinge Detection Threshold
Maximize Mode is being exited incorrectly. This occurs when the device is being
held in portrait mode, nearly vertical, and the user is slightly shaking the
device left/right.
When nearly vertical we can't reliably calculate the hing angle, and ignore
accelerometer readings too close to the vertical. This change updates our
current threshold so that the device must be further from the vertical to decide
upon exiting maximize mode.
TEST=MaximizeModeControllerTest.HingeAligned
BUG=470256
Review URL: https://codereview.chromium.org/
1035533005
Cr-Commit-Position: refs/heads/master@{#324464}