AudioTrackTest: get/setStartThresholdInFrames

Test: atest AudioTrackTest#testStartThresholdInFrames
Test: atest AudioTrackTest#testStartThresholdInFramesExceptions
Bug: 183003720
Merged-In: Ie6949379475675dbbea4fa7ebbd0b34c29d362ae
Change-Id: Ie6949379475675dbbea4fa7ebbd0b34c29d362ae
1 file changed