Call : Manage microphone detection

Change-Id: Ib21105b7e7ca6c19fa11d973b676389908415e4e
diff --git a/ring-android/app/src/main/res/values/strings.xml b/ring-android/app/src/main/res/values/strings.xml
index 7418ee5..e57557b 100644
--- a/ring-android/app/src/main/res/values/strings.xml
+++ b/ring-android/app/src/main/res/values/strings.xml
@@ -214,4 +214,6 @@
     <string name="gallery_error_title">No Gallery app found</string>
     <string name="gallery_error_message">No application found on device to open Gallery</string>
 
+    <string name="generic_error">An unknown error occurred</string>
+
 </resources>
diff --git a/ring-android/app/src/main/res/values/strings_call.xml b/ring-android/app/src/main/res/values/strings_call.xml
index 49d4d86..59502a9 100644
--- a/ring-android/app/src/main/res/values/strings_call.xml
+++ b/ring-android/app/src/main/res/values/strings_call.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
 Copyright (C) 2004-2016 Savoir-faire Linux Inc.
 
 Author: Alexandre Lision <alexandre.lision@savoirfairelinux.com>
@@ -21,6 +20,9 @@
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 -->
 <resources>
+    <!-- Call error -->
+    <string name="call_error_no_microphone">Call canceled. No microphone detected.</string>
+
     <!-- SipCalls -->
     <string name="call_human_state_searching">Searching</string>
     <string name="call_human_state_incoming">Incoming</string>