CTS-Verifier: Fix Sensor Test layout for watches

On watches, the sensor_test layout with an OpenGL SurfaceView under
a ScrollView causes the problem of Gyroscope Measurement Activity not
being cleaned up properly resulting in the failure to start
CTSVerifier from Recents/All Apps.

This change moves the OpenGL SurfaceView out of the ScrollView for
watches so that Gyroscope Measurement Activity is cleaned up
successfully after the test is completed.

Bug: 238210527
Test: Complete CTS Verifier > Gyroscope Measurement Test and then
close and reopen CTS Verifier app from Recents/All Apps

Change-Id: Ieb7f2025a2f5bb11619d6b13697e86c9a68f0554