Remove APM-internal usage of EchoControlMobile

This is a sibling CL to a similar one for EchoCancellation:
https://webrtc-review.googlesource.com/c/src/+/97603

 - EchoControlMobileImpl will no longer inherit EchoControlMobile.
 - Removes usage of AudioProcessing::echo_control_mobile() inside most of
   the audio processing module and unit tests.

The CL breaks audioproc_f backwards compatibility: It can no longer
use all recorded settings (comfort noise, routing mode), but prints an
error message when unsupported settings are encountered.

Tested: audioproc_f with .wav and aecdump inputs.
Bug: webrtc:9535
Change-Id: I63c3c81bcaf44021315978e1a0f3e42173b988ce
Reviewed-on: https://webrtc-review.googlesource.com/101621
Reviewed-by: Alex Loiko <aleloi@webrtc.org>
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24888}
diff --git a/modules/audio_processing/debug.proto b/modules/audio_processing/debug.proto
index 10a98d5..40bd5d5 100644
--- a/modules/audio_processing/debug.proto
+++ b/modules/audio_processing/debug.proto
@@ -55,8 +55,8 @@
   optional int32 aec_suppression_level = 5;
   // Mobile AEC.
   optional bool aecm_enabled = 6;
-  optional bool aecm_comfort_noise_enabled = 7;
-  optional int32 aecm_routing_mode = 8;
+  optional bool aecm_comfort_noise_enabled = 7 [deprecated = true];
+  optional int32 aecm_routing_mode = 8 [deprecated = true];
   // Automatic gain controller.
   optional bool agc_enabled = 9;
   optional int32 agc_mode = 10;