reduce mic gain for video chat use case

Added new path for mic with AEC in speakerphone mode
for voice/video chat use case and reduced gain by 9 dB.

Bug: 13279002.

Change-Id: Idcfc9b07caa3b6f9d2cdfec98df426e73c4b45de
diff --git a/mixer_paths.xml b/mixer_paths.xml
index 49be2d5..78fa53c 100644
--- a/mixer_paths.xml
+++ b/mixer_paths.xml
@@ -309,6 +309,12 @@
         <ctl name="DEC4 Volume" value="97" />
     </path>
 
+    <path name="speaker-mic-aec">
+        <path name="adc3" />
+        <ctl name="ADC3 Volume" value="14" />
+        <ctl name="DEC4 Volume" value="88" />
+    </path>
+
     <path name="voice-headphones">
         <path name="headphones" />
         <ctl name="HPHL Volume" value="20" />