fix(android): incremental build creates duplicate "bootstrap.json" entries

[jquick-axway]

JIRA:
https://jira.appcelerator.org/browse/TIMOB-27904

Summary:
This is a regression as of Titanium 8.1.0. Every incremental build duplicates a bootstrap entry in the "bootstrap.json" file, causing its execute() function to be wrongly invoked multiple times on app startup.

Test:

1. Create a Titanium app project.
2. Copy below test.bootstrap.js to Resources directory. Do not change the file name.
3. Build and run on Android.
4. Notice a bootstrap dialog appears once. (This is good.)
5. Build and run on Android again.
6. Verify that bootstrap dialog only appears once.

test.bootstrap.js

Ti.API.info("### Bootstrap was required-in.");

var wasExecuted = false;
exports.execute = function(finished) {
	Ti.API.info("### Bootstrap execute() method was called.");
	var message = "This is the bootstrap dialog.";
	if (wasExecuted) {
		message = "Uh-oh!!! Bootstrap was wrongly executed again.";
	}
	var dialog = Ti.UI.createAlertDialog({
		message: message,
		buttonNames: ['OK'],
		cancel: 0,
		persistent: true,
	});
	dialog.addEventListener('click', finished);
	dialog.addEventListener('cancel', finished);
	dialog.show();
	wasExecuted = true;
};

[build]

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

	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.
📖	❌ 8 tests have failed There are 8 tests failing and 703 skipped out of 7229 total tests.

Tests:

Classname	Name	Time	Error
android.emulator.Titanium.UI.Window.events	close event is fired (9)	20.017	Error: timeout of 20000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_NONE (9)	10.013	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_EXPLODE (9)	10.007	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_SLIDE_BOTTOM (9)	10.008	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_SLIDE_TOP (9)	10.008	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_SLIDE_LEFT (9)	10.02	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_SLIDE_RIGHT (9)	10.015	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Window.activity transitions	TRANSITION_FADE_IN/TRANSITION_FADE_OUT (9)	10.048	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)

Generated by 🚫 dangerJS against e0b3468

[ssekhri]

FR Passed.

Verified on:
Mac OS: 10.15.4
SDK: 9.1.0.v20200521135203
Appc CLI: 8.0.0
JDK: 11.0.6
Node: 10.17.0
Studio: 6.0.0.202005141803
Device: Nexus4(v5.1.1) device, Pixel3(v10.0) emulator

[sgtcoolguy]

cherry-picked to 9_0_X as well...