[TIMOB-11178]Implementation for Autopause API.

[srahim]

Testing Instruction

** Make an app with the following code app.js
** add location into the backgroundmodes in tiapp.xml

<ios>
<plist>
<dict>
  <key>UIBackgroundModes</key>
  <array>
    <string>location</string>
  </array>
</dict>
</plist>
</ios>

** By default i have set the autopause to be false.

TEST 1
** Put the app in background .
** Move around for a bit and ensure you receive location update
** Now put the phone on the table and leave it for a while(say 20-30 to be sure)
** Verify that location update paused is not fired.

TEST 2

** Open the same app.
** Switch the puaseLocationUpdatesAutomatically to true(0N)
** Put the app in background.
** Move around for a bit and ensure you receive location update
** Now put the phone on the table and leave it for a while(say 20-30 to be sure).
** Verify that location update paused is fired.
** Once the location paused event is fired. Now open the app and move around.
** Ensure that the location update resumed event is fired and the app continues to receive location updates.

If there is any confusion while testing let me know.

[WhichKatieDid]

I do want to wean away from ENSURE_UI_THREAD, as it means a lot more than needed is done. Consider TiThreadPerformOnMainThread.

[WhichKatieDid]

Minor style quibbles, but nothing wrong logically in CR.

[srahim]

Code Updated ... Ready for review again.

[WhichKatieDid]

CR passed, FR inconclusive, but that may be due to the nature of the beast.

[WhichKatieDid]

Talked with Srahim, later test (with same code!) generated pause events. This may be one that's difficult to test, going on the whims of the OS. Either way, FR finally passed.