Bug 1999994 - catch NPE during IPC. r=geckoview-reviewers,nalexander

Differential Revision: https://phabricator.services.mozilla.com/D272738

Author: jhlin

mobile/android/geckoview/src/main/java/org/mozilla/gecko/media/CodecProxy.java

@@ -441,8 +441,12 @@ public synchronized boolean releaseOutput(final Sample sample, final boolean ren
     try {
       mRemote.releaseOutput(sample, render);
     } catch (final RemoteException e) {
-      Log.e(LOGTAG, "remote fail to release output:" + sample.info.presentationTimeUs);
-      e.printStackTrace();
+      Log.e(LOGTAG, "remote fail to release output:" + sample.info.presentationTimeUs, e);
+    } catch (final NullPointerException npe) {
+      // Sometimes NPE happens when unmarshalling IPC reply, but it's fine because
+      // releasing/rendering has been done remotely already.
+      Log.d(
+          LOGTAG, "ignore NPE when " + (render ? "render" : "release") + " output: " + sample, npe);
     }
     sample.dispose();