Implement emergency dialer actions

Also updates visuals.

Bug: 19841919
Change-Id: If2e808d2ce7854db370c440c6c2638cc39bf4645
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 22732ef..4aa3922 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1292,4 +1292,7 @@
     <string name="tty_mode_key">button_tty_mode_key</string>
     <!-- DO NOT TRANSLATE. Internal key for a voicemail notification preference. -->
     <string name="wifi_calling_settings_key">button_wifi_calling_settings_key</string>
+
+    <!-- Hint appearing below a selected action on the emergency dialer telling user to tap again to execute the action [CHAR LIMIT=NONE] -->
+    <string name="emergency_action_launch_hint">Touch again to open</string>
 </resources>