Prepare for splitting FrameType into AudioFrameType and VideoFrameType

This cl deprecates the FrameType enum, and adds aliases AudioFrameType
and VideoFrameType.

After downstream usage is updated, the enums will be separated
and be moved out of common_types.h.

Bug: webrtc:6883
Change-Id: I2aaf660169da45f22574b4cbb16aea8522cc07a6
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/123184
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27011}
diff --git a/modules/video_coding/jitter_buffer_unittest.cc b/modules/video_coding/jitter_buffer_unittest.cc
index 2651565..2863efb 100644
--- a/modules/video_coding/jitter_buffer_unittest.cc
+++ b/modules/video_coding/jitter_buffer_unittest.cc
@@ -362,7 +362,7 @@
     return jitter_buffer_->InsertPacket(packet, &retransmitted);
   }
 
-  VCMFrameBufferEnum InsertFrame(FrameType frame_type) {
+  VCMFrameBufferEnum InsertFrame(VideoFrameType frame_type) {
     stream_generator_->GenerateFrame(
         frame_type, (frame_type != kEmptyFrame) ? 1 : 0,
         (frame_type == kEmptyFrame) ? 1 : 0, clock_->TimeInMilliseconds());
@@ -371,7 +371,7 @@
     return ret;
   }
 
-  VCMFrameBufferEnum InsertFrames(int num_frames, FrameType frame_type) {
+  VCMFrameBufferEnum InsertFrames(int num_frames, VideoFrameType frame_type) {
     VCMFrameBufferEnum ret_for_all = kNoError;
     for (int i = 0; i < num_frames; ++i) {
       VCMFrameBufferEnum ret = InsertFrame(frame_type);