fix(android): module build to download ndk with gradle tool 3.5.0+

[jquick-axway]

JIRA:
https://jira.appcelerator.org/browse/TIMOB-27798

Note:
The PR for TIMOB-27755 must be merged first. Otherwise, Titanium's build tools will fail to find the downloaded NDK under the side-by-side directory which will break Titanium app builds.

Summary:

• After updating Android gradle tool from 3.4.2 to 3.6.0, module builds no longer auto-downloads NDK if missing.
• Issue is on Google's end which default to an "unstable" NDK version and tool does not support downloading unstable versions.

Test:
Follow the the test procedure written in PR #11531.

[build]

	Fails
🚫	Tests have failed, see below for more information.

	Messages
📖	💾 Here's the generated SDK zipfile.
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	❌ 1 tests have failed There are 1 tests failing and 709 skipped out of 7345 total tests.

Tests:

Classname	Name	Time	Error
ios.ipad.Titanium.UI.WebView	progress event (13.2.2)	0.791	Error: expected 'https://www.google.com/#spf=1588219418548' to be equals one of Array [ 'https://www.google.com/', 'https://www.google.com' ] fail@file:///Users/build/Library/Developer/CoreSimulator/Devices/F77CB658-56A6-4456-8790-32B676E15B36/data/Containers/Bundle/Application/FFF7DD91-FC1B-4FCE-81A7-E0E34E8F3B4E/mocha.app/node_modules/should/cjs/should.js:275:19 value@file:///Users/build/Library/Developer/CoreSimulator/Devices/F77CB658-56A6-4456-8790-32B676E15B36/data/Containers/Bundle/Application/FFF7DD91-FC1B-4FCE-81A7-E0E34E8F3B4E/mocha.app/node_modules/should/cjs/should.js:356:13 file:///Users/build/Library/Developer/CoreSimulator/Devices/F77CB658-56A6-4456-8790-32B676E15B36/data/Containers/Bundle/Application/FFF7DD91-FC1B-4FCE-81A7-E0E34E8F3B4E/mocha.app/ti.ui.webview.test.js:733:28

Generated by 🚫 dangerJS against 1d7168c

[garymathews]

CR: PASS

[garymathews]

NOTE FOR QE: Although the code changes are good, the fallback NDK 21.0.6113669 will exhibit Bad file descriptor. This is okay, and will be addressed in 9.1.0.

[jquick-axway]

@garymathews, I think I should set the NDK version 1 release back to avoid that.

[ssekhri]

FR Passed.

1. With no NDK on the system, the module build installs side-by-side NDK
2. When side-by-side NDK (any other version) is already installed the module build does not install the NDK
3. When side-by-side NDK is not installed but another NDK is on the system. "appc ti config" does not have flag for android.ndkPath set then the build for module installs side-by-side NDK.
4. When side-by-side NDK is not installed but another NDK is on the system. "appc ti config" flag for android.ndkPath is set to the NDK on the system then the module build does not install side-by-side NDK.

Verified on:
Mac OS: 10.15.4
SDK: 9.1.0.v20200413165732
Appc CLI: 8.0.0
JDK: 13.0.2
Node: 10.17.0