AccountDetails: Show name instead of email.

This brings this UI in line with the corresponding UI in the webapp,
which is the card that pops up on clicking on a user's name or avatar.

The user's email address can be helpful information, but their name is
usually more helpful.  Also, under an org setting that's currently in
beta after being a frequent request for a long time, users' real email
addresses won't even be available to normal users -- so the `email`
property will be an opaque address made up by the server.  (See #3196.)
So we certainly don't want to show that here.

While we're here, also swap the order of the name and the status
indicator, again following the webapp.

src/account-info/AccountDetails.js

@@ -53,8 +53,8 @@ class AccountDetails extends PureComponent<Props, void> {
             />
           </View>
           <View style={componentStyles.statusWrapper}>
+            <RawLabel style={[styles.largerText, styles.halfMarginRight]} text={user.full_name} />
             <PresenceStatusIndicator email={user.email} hideIfOffline={false} />
-            <RawLabel style={[styles.largerText, styles.halfMarginLeft]} text={user.email} />
           </View>
           {userStatusText !== undefined && (
             <RawLabel