building: update instructions for AS 3.5

The building from source instructions were written around the time
Android Studio (AS) was version 1.5. Since then, some prompts/options have
been removed or moved around. Thus, users willing to build from source
may get confused with the current instructions. Update the screenshots
to show a more version of AS (3.5), and remove the steps that are not
longer necessary.

content/page/building.md

@@ -22,26 +22,20 @@ Repository URL**, then click **Clone**.
 
 ![](/img/building/03.png)
 
+This process may take a bit, and you should see a dialog similar to this.
+
+![](/img/building/03-2.png)
+
 5\) When the source code has downloaded, click **Yes** to open the
 project.
 
 ![](/img/building/04.png)
 
-6\) Click **OK** to accept the default settings.
-
-![](/img/building/05.png)
-
-7\) If Android Studio asks you about an **Unregistered VCS root**, click
-**Add root**. This will allow you to update the source code later
-without repeating the previous steps.
-
-![](/img/building/06.png)
-
-8\) Select **Build > Build APK** from the Android Studio menu.
+6\) Select **Build > Build Bundle(s)/APK(s) > Build APK(s)** from the Android Studio menu.
 
 ![](/img/building/13.png)
 
-9\) When the build process finishes, click **Show in File Manager** to
+7\) When the build process finishes, click **Show in File Manager** to
 open the folder containing the APK file, **briar-android-debug.apk**.
 You can
 [sideload](http://www.digitalcitizen.life/how-sideload-apps-using-apk-files-android-devices)
@@ -49,17 +43,21 @@ this file onto any Android device.
 
 ![](/img/building/11.png)
 
-10\) Briar is under constant development, so you should check for updates
+8\) Briar is under constant development, so you should check for updates
 regularly. To get the latest version of the source code, click the
-**Update Project** button on the Android Studio toolbar.
+**Update Project** on option the **VCS** menu.
 
 ![](/img/building/09.png)
 
-11\) Click **OK** to accept the default settings.
+Alternatively, you can also use the **Update Project** button on the toolbar:
+
+![](/img/building/09-2.png)
+
+9\) Click **OK** to accept the default settings.
 
 ![](/img/building/10.png)
 
-12\) Repeat steps 8 and 9 to build and install the updated app.
+10\) Repeat steps 6 and 7 to build and install the updated app.
 
 If you're interested in getting involved or following the progress of
 the project, please [join the development mailing