Fix default value of stereoReset() in the documentation.

The default has been 'true' for eternity in the code. But the
documentation was mistakenly saying it was 'false'. Going with the
code, since there are people out there relying on the code continuing
to work the same way.

Bug: 22557371
Change-Id: I6f4e7b2052d0cc30d41e8ccf2b9a5c6111fa0ab7