feat(android)(9_3_X): add "tapjacking" prevention features

[jquick-axway]

JIRA:
https://jira.appcelerator.org/browse/TIMOB-28080

Note:
Tapjacking is an Android exploit where a malicious app can display a translucent system overlay on top of other apps used to intercept touches or to trick the end-user to tapping on the overlay.

Summary:

• Added boolean property "filterTouchesWhenObscured" to all Ti.UI.View derived types.
• Added event "touchfiltered" event to Ti.UI.Button.
  • Only fired "filterTouchesWhenObscured" is true and touch was obscured by overlay.
  • Intended to be used to display an alert explaining why button click was blocked.
• Added boolean property "obscured" to all touch related events.
  • Will only be true if "filterTouchesWhenObscured" is false.

---

Test:

1. Install the "AppcOverlay.apk" attached to TIMOB-28080 on Android.
   adb install -r <PathToApk>
2. Build and run the below on Android.
3. Tap on "Button with Filter" and verify a "click" alert appears.
4. Verify that you see the below in the log.

[INFO]  @@@ touchstart obscured: false
[INFO]  @@@ touchmove obscured: false
[INFO]  @@@ touchmove obscured: false
[INFO]  @@@ touchend obscured: false
[INFO]  @@@ click obscured: false
[INFO]  @@@ singletap obscured: false

5. Launch the "AppcOverlay" app.
6. Tap on the "Show Fullscreen Overlay" button.
7. If "Display over other apps" window appears, then switch on, tap back, and then tap on "Fullscreen" button again.
8. A red translucent window should now fill the screen and on top of all other apps.
9. Go back to the below test app.
10. Tap on the "Button with Filter" button.
11. Verify a "touchfiltered" alert appears.
12. Tap on the "Button without Filter" button.
13. Verify a "click" alert appears.
14. Verify that you see the below in the log.

[INFO]  @@@ touchstart obscured: true
[INFO]  @@@ touchmove obscured: true
[INFO]  @@@ touchend obscured: true
[INFO]  @@@ click obscured: true
[INFO]  @@@ singletap obscured: true

app.js

function logTouchEvent(event) {
	Ti.API.info("@@@ " + event.type + " obscured: " + event.obscured);
}
function addTouchHandlersTo(view) {
	view.addEventListener("click", function() {
		alert("click");
	});
	view.addEventListener("touchfiltered", function() {
		alert("touchfiltered\n(Overlay detected.)");
	});
	view.addEventListener("click", logTouchEvent);
	view.addEventListener("dblclick", logTouchEvent);
	view.addEventListener("singletap", logTouchEvent);
	view.addEventListener("doubletap", logTouchEvent);
	view.addEventListener("longclick", logTouchEvent);
	view.addEventListener("touchstart", logTouchEvent);
	view.addEventListener("touchmove", logTouchEvent);
	view.addEventListener("touchend", logTouchEvent);
	view.addEventListener("touchcancel", logTouchEvent);
}

var window = Ti.UI.createWindow({ title: "Tap Jacking Test" });
var button1 = Ti.UI.createButton({
	title: "Button with Filter",
	top: "25%",
	filterTouchesWhenObscured: true,
})
addTouchHandlersTo(button1);
window.add(button1);
var button2 = Ti.UI.createButton({
	title: "Button without Filter",
	bottom: "25%",
	filterTouchesWhenObscured: false,
})
addTouchHandlersTo(button2);
window.add(button2);
window.open();

[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.
📖	❌ 2 tests have failed There are 2 tests failing and 717 skipped out of 7993 total tests.

Tests:

Classname	Name	Time	Error
ios.ipad.Titanium.UI.ImageView	image error event (14.0)	5.002	Error: timeout of 5000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/8397E161-2778-43CE-AB1B-BDA17BDD4023/data/Containers/Bundle/Application/F7D0FA74-E04F-4533-A67C-AC2E39561054/mocha.app/ti-mocha.js:4326:27
ios.ipad.Titanium.UI.iOS.CollisionBehavior.example	works (14.0)	10.002	Error: timeout of 10000ms exceeded file:///Users/build/Library/Developer/CoreSimulator/Devices/8397E161-2778-43CE-AB1B-BDA17BDD4023/data/Containers/Bundle/Application/F7D0FA74-E04F-4533-A67C-AC2E39561054/mocha.app/ti-mocha.js:4326:27

Generated by 🚫 dangerJS against b6335c1

[garymathews]

CR: PASS

Minor comment about test case.

[ssjsamir]

FR Passed, tested using the example in the description.

Test Environment

MacOS Big Sur: 11.0 Beta 7
Xcode: 12.0 
Java Version: 1.8.0_242
Android NDK: 21.3.6528147
Node.js: 12.18.1
""NPM":"5.0.0","CLI":"8.1.1""
Pixel XL (10.0)