Move some code from onCreate() to onStart() in Chromoting Android app

This reloads the system's accounts list whenever the app is started
(so if the user adds an account, then switches back to the app, the
change will be reflected).

This also reloads the host list, which will alleviate many of the
problems with stale OAuth tokens such as in bug 304719.

BUG=304719
NOTRY=true

Review URL: https://codereview.chromium.org/212673010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@259763 0039d316-1c4b-4281-b951-d872f2087c98

remoting/android/java/src/org/chromium/chromoting/Chromoting.java

@@ -155,6 +155,16 @@ public void onCreate(Bundle savedInstanceState) {
 
         // Bring native components online.
         JniInterface.loadLibrary(this);
+    }
+
+    /**
+     * Called when the activity becomes visible. This happens on initial launch and whenever the
+     * user switches to the activity, for example, by using the window-switcher or when coming from
+     * the device's lock screen.
+     */
+    @Override
+    public void onStart() {
+        super.onStart();
 
         mAccounts = AccountManager.get(this).getAccountsByType(ACCOUNT_TYPE);
         if (mAccounts.length == 0) {