SIP API not supported on beaglebone

```
What steps will reproduce the problem?
1. Compile SipDemo sample from android SDK
2. Install WalkieTalkieActivity on beaglebone
3. Run the app

What is the expected output? What do you see instead?
After configuration I expect to call someone over SIP protocol. Instead when I
debugged the application I get null SipManager (file
"WalkieTalkieActivity.java" class "WalkieTalkieActivity" method
"initializeManager" line 104).

What version of the product are you using? On what operating system?
I'm using BeagleBone with LCD3 cape REV A2. I' ve installed android JB 4.2.2
(sources from git://gitorious.org/rowboat/) compiled with ubuntu 12.10 64-bit

Please provide any additional information below.
From API docs I read SipManager.newInstance return null if SIP API not
supported, but it should be supported from API level 9 and JB 4.2.2 has API
level 17.

```

Original issue reported on code.google.com by `mas...@gmail.com` on 9 Mar 2013 at 7:06

Reproduce the SIP API failure by following the SipDemo and WalkieTalkieActivity steps on the BeagleBone Android JB 4.2.2 setup. Start at WalkieTalkieActivity.java, class WalkieTalkieActivity, method initializeManager around line 104, and investigate why SipManager.newInstance returns null. Done means the cause is established and SIP calling either works on this target or the unsupported behavior is clearly documented.

Written by the indexing model from the issue text.