Fix EffectsRecorder error path handling when ending recording.

Previously, if mRunner had already been set to null, errors sent by
mediarecorder would not be propagated to VideoCamera correctly.  This
resulted in crashes when putting device to sleep right after starting
timelapse recording with effects.

Bug: 5627242
Change-Id: I3ae3c713a0aaf9a4507442bbbcd3ec89971d5f95
1 file changed