feat: added an option to prevent phone from going into sleep mode if in-app

app/src/main/java/com/cappielloantonio/tempo/util/Preferences.kt

@@ -46,6 +46,7 @@ object Preferences {
     private const val SKIP_MIN_STAR_RATING = "skip_min_star_rating"
     private const val MIN_STAR_RATING = "min_star_rating"
     private const val ARTIST_ALBUM_LAYOUT = "artist_album_layout"
+    private const val ALWAYS_ON_DISPLAY = "always_on_display"
 
 
     @JvmStatic
@@ -357,4 +358,9 @@ object Preferences {
         App.getInstance().preferences.edit().putBoolean(ARTIST_ALBUM_LAYOUT, isArtistAlbumLayoutHorizontal)
             .apply()
     }
+
+    @JvmStatic
+    fun isDisplayAlwaysOn(): Boolean {
+        return App.getInstance().preferences.getBoolean(ALWAYS_ON_DISPLAY, false)
+    }
 }