Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/webrtc/modules/audio_coding/neteq/OWNERS

@@ -0,0 +1,11 @@
+henrik.lundin@webrtc.org
+tina.legrand@webrtc.org
+turaj@webrtc.org
+minyue@webrtc.org
+
+per-file *.isolate=kjellander@webrtc.org
+
+# These are for the common case of adding or renaming files. If you're doing
+# structural changes, please get a review from a reviewer in this file.
+per-file *.gyp=*
+per-file *.gypi=*