feat(android): adding androidback property to showCamera

[m1ga]

JIRA: https://jira.appcelerator.org/browse/TIMOB-25633

Ti.Media.showCamera({
	overlay: Ti.UI.createView(),
	androidback: function() {
		// go back in stack history etc or
		console.log("android back");
		// Ti.Media.hideCamera();  // won't close the camera unless you use this
	}
});

Updating this PR #9697 for @AppWerft

• clang
• documentation
• fixed conflicts
• updated example

This PR will add androidback to showCamera() on Android so you can use the phones back button in overlay mode. You have to take care of hideCamera() yourself inside the callback.

Credit goes to @AppWerft for working on the original PR

[build]

	Warnings
⚠️	Commit ec38ae6089ffe86337f30778b144f009cdaab6a4 has a message "make style check happy" giving 2 errors: subject may not be empty type may not be empty
⚠️	Commit 0e0aaa408f8832bfa3d33d022e3364ea44f5e09b has a message "fix imports" giving 2 errors: subject may not be empty type may not be empty

	Messages
📖	💾 Here's the generated SDK zipfile.
📖	🎉 Another contribution from our awesome community member, m1ga! Thanks again for helping us make Titanium SDK better. 👍
📖	🚨 This PR has one or more commits with warnings/errors for commit messages not matching our configuration. You may want to squash merge this PR and edit the message to match our conventions, or ask the original developer to modify their history.
📖	✅ All tests are passing Nice one! All 6627 tests are passing. (There are 708 skipped tests not included in that total)

Generated by 🚫 dangerJS against 0e0aaa4

[sgtcoolguy]

Code changes look ok.

I updated the commit message and the outdated since value in the doc change.

[ssjsamir]

FR Passed: Camera does not close automatically unless Ti.Media.hideCamera(); is used. Also able to use the androidback property.

Test case (alloy app):
index.js:

_.delay(function() {
	Titanium.Media.showCamera({
		overlay: Ti.UI.createView(),
		androidback: function() {
		// go back in stack history etc or
		console.log("android back");
		//Ti.Media.hideCamera();  // won't close the camera unless you use this
	}
	});
}, 4000);

$.index.open();

index.xml

<Alloy>
	<Window class="container">
		<ImageView id="img"></ImageView>
	</Window>
</Alloy>

Every time back button is pressed the following is logged (unless Ti.Media.hideCamera(); is uncommented)
[INFO] �� � android back
Test Environment

MacOS Catalina: 10.15.5 Beta
Xcode: 11.4
Java Version: 1.8.0_131
Android NDK: 21.1.6273396-beta2
Node.js: 10.16.3
""NPM":"5.0.0-1","CLI":"8.0.0-master.10""
Pixel XL 10.0