Enable mid signaling by default. (#1276)

* Enable mid signaling by default.

Author: bgrozev

jicofo-selector/src/main/resources/reference.conf

@@ -203,7 +203,7 @@ jicofo {
         id = 9
       }
       mid {
-        enabled = false
+        enabled = true
         id = 10
       }
       extmap-allow-mixed = true

jicofo/src/test/kotlin/org/jitsi/jicofo/CodecConfigTest.kt

@@ -73,7 +73,7 @@ class CodecConfigTest : ShouldSpec() {
             config.audioLevel.enabled shouldBe true
             config.audioLevel.id shouldBe 1
 
-            config.mid.enabled shouldBe false
+            config.mid.enabled shouldBe true
             config.mid.id shouldBe 10
 
             config.av1DependencyDescriptor.enabled shouldBe true

jicofo/src/test/kotlin/org/jitsi/jicofo/codec/CodecUtilTest.kt

@@ -146,11 +146,11 @@ class CodecUtilTest : ShouldSpec() {
             context("MID") {
                 val midUri = URI.create("urn:ietf:params:rtp-hdrext:sdes:mid")
 
-                CodecUtil.createAudioRtpHdrExtExtensions().any { it.uri == midUri } shouldBe false
-                CodecUtil.createVideoRtpHdrExtExtensions().any { it.uri == midUri } shouldBe false
-                withNewConfig("jicofo.codec.rtp-extensions.mid.enabled=true") {
-                    CodecUtil.createAudioRtpHdrExtExtensions().any { it.uri == midUri } shouldBe true
-                    CodecUtil.createVideoRtpHdrExtExtensions().any { it.uri == midUri } shouldBe true
+                CodecUtil.createAudioRtpHdrExtExtensions().any { it.uri == midUri } shouldBe true
+                CodecUtil.createVideoRtpHdrExtExtensions().any { it.uri == midUri } shouldBe true
+                withNewConfig("jicofo.codec.rtp-extensions.mid.enabled=false") {
+                    CodecUtil.createAudioRtpHdrExtExtensions().any { it.uri == midUri } shouldBe false
+                    CodecUtil.createVideoRtpHdrExtExtensions().any { it.uri == midUri } shouldBe false
                 }
             }
             context("TCC") {