Update Android camera switch API to allow specifying a name

The current camera switch API sequentially cycles through each
camera name for each method invocation. This policy provides
reasonable behavior for devices with 2 or 3 cameras, but
presents challenges with devices that contain several cameras.
For example in a scenario where the current camera is oriented
on the same side as the next camera name, a developer would need to
call switchCamera multiple times to capture from a camera oriented on
a different side of the device.

This commit allows a developer to specify a camera name when switching
cameras. This flexibility allows developers to have more control over
which device they switch to in cases where a device contains several cameras.

Bug: webrtc:11261
Change-Id: I93d46d70b2c7cf735a411a4ef4f33e926bf3a5ea
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/165040
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30199}

sdk/android/api/org/webrtc/CameraVideoCapturer.java

@@ -61,6 +61,12 @@ public interface CameraVideoCapturer extends VideoCapturer {
    */
   void switchCamera(CameraSwitchHandler switchEventsHandler);
 
+  /**
+   * Switch camera to the specified camera id. This can only be called while the camera is running.
+   * This function can be called from any thread.
+   */
+  void switchCamera(CameraSwitchHandler switchEventsHandler, String cameraName);
+
   /**
    * MediaRecorder add/remove handler - one of these functions are invoked with the result of
    * addMediaRecorderToCamera() or removeMediaRecorderFromCamera calls.