Android: Fix texture leak.
Android: Fix texture leak.

The bug fix in https://codereview.webrtc.org/2033943004 was
incomplete, and leaks the texture in the case of texture frames
arriving during close. See also the similar bug fixed in
https://codereview.webrtc.org/2012773004.

BUG=webrtc:5966
R=perkj@webrtc.org, sakal@webrtc.org

Review URL: https://codereview.webrtc.org/2044383002 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13067}

TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc