Make updating showTimeoutMs takes effect immediately.

Update PlaybackControlView and SimpleExoPlayerView so when showTimeoutMs is set
while the controller is shown, the new timeout takes effect immediately.

GitHub: google#3554

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=179171727

library/ui/src/main/java/com/google/android/exoplayer2/ui/PlaybackControlView.java

@@ -519,6 +519,10 @@ public int getShowTimeoutMs() {
    */
   public void setShowTimeoutMs(int showTimeoutMs) {
     this.showTimeoutMs = showTimeoutMs;
+    // showTimeoutMs is changed, so call hideAfterTimeout to reset the timeout.
+    if (isVisible()) {
+      hideAfterTimeout();
+    }
   }
 
   /**

library/ui/src/main/java/com/google/android/exoplayer2/ui/SimpleExoPlayerView.java

@@ -613,6 +613,11 @@ public int getControllerShowTimeoutMs() {
   public void setControllerShowTimeoutMs(int controllerShowTimeoutMs) {
     Assertions.checkState(controller != null);
     this.controllerShowTimeoutMs = controllerShowTimeoutMs;
+    // If controller is already visible, call showController to update the controller's timeout
+    // if necessary.
+    if (controller.isVisible()) {
+      showController();
+    }
   }
 
   /**