SoundPoolTest: fix volume.

Volume is out of bounds for some of the tests; an integer value of 10
and 20 is used - it should be a float value between 0.f and 1.f.

This is bad example code.

Test: SoundPoolOggTest, listen for sounds.
Bug: 23978255
Change-Id: I2bbd46f266911752041a17f4c0b153914ea1cce0
1 file changed