fix(android): blob fails to read WebP image info

[jquick-axway]

JIRA:
https://jira.appcelerator.org/browse/TIMOB-28535

Summary:

• When loading a WebP image via a Ti.Blob then its width/height and mimeType properties return the wrong values and the blob's image*() methods wrongly return null.
• Caused by Java URLConnection.guessContentTypeFromStream() method which wrongly returned "audio/x-wav" instead of "image/webp", which caused the blob to think it wasn't an image.

Test:

1. Copy "TiLogoOpaque.webp" from TIMOB-28535 to project folder: ./Resources/assets/images
2. Use "app.js" code shown in ticket TIMOB-28535.
3. Build and run on Android.
4. Verify a red Titanium logo with rounded corners appears in app. (Use to show nothing.)
5. Verify app's "Image Size" label reads: 1024x1024
6. Verify app's "Mime-Type" label reads: image/webp

[build]

	Warnings
⚠️	Tests have failed, see below for more information.

	Messages
📖	✊ 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 1158 skipped out of 21062 total tests.
📖	💾 Here's the generated SDK zipfile.

Tests:

Classname	Name	Time	Error
android.emulator.main.Titanium.Geolocation.methods	#forwardGeocoder() works via callback argument (12)	5.026	Error: expected false to be true at Assertion.fail (/node_modules/should/cjs/should.js:275:13) at Assertion.value (/node_modules/should/cjs/should.js:356:9) at Geolocation.<anonymous> (/ti.geolocation.test.js:585:32)

Generated by 🚫 dangerJS against 5202b24

[garymathews]

@jquick-axway Looks like .image with Ti.Blob WebP test is failing on Android 5.0

[jquick-axway]

@garymathews , the WebP image loads fine on Android 5.0, but the window's "postlayout" event was happening before the ImageView resized itself to fit its image. I re-worked the event handling to make the unit test more reliable.

[garymathews]

CR: PASS