Added rule action to play sound

app/src/main/java/eu/faircode/email/MediaPlayerHelper.java

@@ -0,0 +1,52 @@
+package eu.faircode.email;
+
+import android.content.Context;
+import android.media.AudioAttributes;
+import android.media.MediaPlayer;
+import android.net.Uri;
+
+import java.io.IOException;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+
+public class MediaPlayerHelper {
+    private static final int MAX_DURATION = 30; // seconds
+
+    static void play(Context context, Uri uri, boolean alarm) throws IOException {
+        Semaphore sem = new Semaphore(0);
+
+        AudioAttributes attrs = new AudioAttributes.Builder()
+                .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
+                .setUsage(alarm ? AudioAttributes.USAGE_ALARM : AudioAttributes.USAGE_NOTIFICATION)
+                .build();
+
+        MediaPlayer mediaPlayer = new MediaPlayer();
+        mediaPlayer.setAudioAttributes(attrs);
+        mediaPlayer.setDataSource(context.getApplicationContext(), uri);
+        mediaPlayer.setLooping(false);
+        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
+            @Override
+            public void onPrepared(MediaPlayer mp) {
+                mp.start();
+            }
+        });
+        mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
+            @Override
+            public void onCompletion(MediaPlayer mp) {
+                mp.stop();
+                mp.release();
+                sem.release();
+            }
+        });
+        mediaPlayer.prepareAsync();
+
+        try {
+            if (!sem.tryAcquire(MAX_DURATION, TimeUnit.SECONDS)) {
+                mediaPlayer.stop();
+                mediaPlayer.release();
+            }
+        } catch (Throwable ex) {
+            Log.w(ex);
+        }
+    }
+}