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}

modules/video_coding/fec_controller_default.h

@@ -44,8 +44,9 @@ class FecControllerDefault : public FecController {
                           uint8_t fraction_lost,
                           std::vector<bool> loss_mask_vector,
                           int64_t round_trip_time_ms) override;
-  void UpdateWithEncodedData(const size_t encoded_image_length,
-                             const FrameType encoded_image_frametype) override;
+  void UpdateWithEncodedData(
+      const size_t encoded_image_length,
+      const VideoFrameType encoded_image_frametype) override;
   bool UseLossVectorMask() override;
   float GetProtectionOverheadRateThreshold();