profile : edit photo and name

This commit allows the user to edit his name and photo.
An AlertDialog pops up when you click on the name or photo in the left menu.
- VCardUtils implements the methods to load and save the vcard for the local profile
- MenuHeaderView implements the methods to change the name or photo

If a VCard does not exist, loadFromDisk saves a default profile.

Change-Id: I810607d02fbec115329a9e159fe44ebec0736618
Tuleap: #1074
diff --git a/ring-android/app/src/main/res/values/strings.xml b/ring-android/app/src/main/res/values/strings.xml
index 9149e88..00aa5f7 100644
--- a/ring-android/app/src/main/res/values/strings.xml
+++ b/ring-android/app/src/main/res/values/strings.xml
@@ -168,4 +168,12 @@
     <string name="prompt_new_password_repeat">Repeat new password</string>
     <string name="account_device_updated_message">You have successfully updated your Ring account.</string>
 
+    <!-- MenuHeaderView -->
+    <string name="profile">My profile</string>
+    <string name="profile_message_warning">This is shared with your contacts</string>
+    <string name="open_the_gallery">Open the gallery</string>
+    <string name="take_a_photo">Take a photo</string>
+    <string name="unknowm_if_empty">Unknown if empty</string>
+    <string name="unknown">Unknown</string>
+
 </resources>