Add key mapping for Voice/Microphone

Change-Id: If4bead9ef0a6c08618a8fc374663b70d117a8612
Signed-off-by: Eugene Mutavchi <Ievgen_Mutavchi@comcast.com>

src/third_party/starboard/rdk/shared/ess_input.cc

diff --git a/src/third_party/starboard/rdk/shared/ess_input.cc b/src/third_party/starboard/rdk/shared/ess_input.cc
index 341cfe6..a48e49d 100644
--- a/src/third_party/starboard/rdk/shared/ess_input.cc
+++ b/src/third_party/starboard/rdk/shared/ess_input.cc
@@ -355,6 +355,9 @@
     case KEY_KPLEFTPAREN:
      return kSbKeyLaunchThisApplication;
 
+    case KEY_F8:
+     return kSbKeyMicrophone;
+
     case KEY_UNKNOWN:
       break;
   }