NuPlayerRenderer: Do not deliver audio too soon after stop

For non-offloaded audio, do not deliver audio data too soon after stop
when in paused mode.  Otherwise the audio MixerThread will keep the
track playing, instead of inactivating the track.

Bug: 23167401
Change-Id: If376148c742fde2d20dc5d23bf0b894fe378e71a
2 files changed