Add NSBluetoothAlwaysUsageDescription key to edX-Info.plist file

[andrey-canon]

Description

This fixes the following error, that is generated, when a new build is uploaded to itunes.

ITMS-90683: Missing Purpose String in Info.plist - Your app's code references one or more APIs that 
access sensitive user data. The app's Info.plist file should contain a 
NSBluetoothAlwaysUsageDescription key with a user-facing purpose string explaining clearly and 
completely why your app needs the data. Starting Spring 2019, all apps submitted to the App Store 
that access user data are required to include a purpose string. If you're using external libraries or 
SDKs, they may reference APIs that require a purpose string. While your app might not use these
 APIs, a purpose string is still required. You can contact the developer of the library or SDK and 
request they release a version of their code that doesn't contain the APIs. Learn more 
(https://developer.apple.com/documentation/uikit/core_app/protecting_the_user_s_privacy). 

[openedx-webhooks]

Thanks for the pull request, @andrey-canon! I've created OSPR-3883 to keep track of it in JIRA. JIRA is a place for product owners to prioritize feature reviews by the engineering development teams.

Feel free to add as much of the following information to the ticket:

• supporting documentation
• edx-code email threads
• timeline information ("this must be merged by XX date", and why that is)
• partner information ("this is a course on edx.org")
• any other information that can help Product understand the context for the PR

All technical communication about the code itself will still be done via the GitHub pull request interface. As a reminder, our process documentation is here.

[codecov]

Codecov Report

Merging #1307 into master will increase coverage by <1%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #1307    +/-   ##
=======================================
+ Coverage      54%     54%   +<1%     
=======================================
  Files         422     422            
  Lines       26607   26607            
=======================================
+ Hits        14410   14416     +6     
+ Misses      12197   12191     -6

Impacted Files	Coverage Δ
Source/CutomePlayer/VideoPlayer.swift	56% <0%> (ø)	⬆️
Source/CutomePlayer/VideoPlayerControls.swift	82% <0%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c56d204...c202803. Read the comment docs.

[natabene]

@andrey-canon Thank you for your contribution. @edx/ios-devs This is ready for your review when you have a chance.

[salman2013]

LGTM

[salman2013]

@saeedbashir Could you also take a look into it.

[openedx-webhooks]

@andrey-canon 🎉 Your pull request was merged!

Please take a moment to answer a two question survey so we can improve your experience in the future.