feat(android): add NDK side-by-side support

[jquick-axway]

JIRA:
https://jira.appcelerator.org/browse/TIMOB-27755

Summary:

• Added NDK side-by-side folder lookup.
  • This is where Android Studio currently installs NDK as of 2019.
  • This folder contains multiple NDK installations.
  • The "ndk-bundle" subdirectory is now deprecated.
• Updated "node-titanium_sdk" from 5.0.0 to 5.1.0.

Test:

1. Uninstall NDK if currently installed.
2. Open Android Studio's preferences window.
3. Go to: Appearances & Behavior -> System Settings -> Android SDK
4. Click on the "SDK Tools" tab.
5. Check the "NDK (Side by side)" option.
6. Click the OK button.
7. Verify that you can build a Titanium app without failure.

[garymathews]

LGTM

[build]

	Messages
📖	👍 Hey!, You deleted more code than you added. That's awesome!
📖	💾 Here's the generated SDK zipfile.
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	✅ All tests are passing Nice one! All 6637 tests are passing. (There are 697 skipped tests not included in that total)

Dependencies with modified semantic versioning:

• node-titanium-sdk - from ^5.0.0 to ^5.1.0

Generated by 🚫 dangerJS against ed6d996

[ssekhri]

FR Passed.
The titanium mobile project builds successfully with following scenarios:

1. No NDK installed
2. Empty NDK folder in ~/Library/Android/sdk/
3. Multiple NDK versions installed in ~/Library/Android/sdk/ndk but ti config has no entry for the flag android.ndkPath
4. Multiple NDK versions installed in ~/Library/Android/sdk/ndk and ti config has entry for the flag android.ndkPath set to one of the ndk versions.

The titanium modules build successfully with scenario 3 and 4.

Verified on:
Mac OS: 10.15.4
SDK: 9.1.0.v20200413161210
Appc CLI: 8.0.0
JDK: 11.0.4
Node: 10.17.0