Reduce the time needed for SensorManager EventQueueStress

Only enable/disable the first eligible sensor for each event queue. As
long as one is enabled succesfully, the object will be set up in the
framework and will need to be destructed before it hits the file limit.

Test: atest VtsHalSensorManagerTargetTest
Bug: 299171035
Change-Id: Iae615023b861c32ad9fa4ce4015acf76316c2e53