[TIMOB-25770] Android: requestThumbnailImagesAtTimes() does not work with remote content

[ypbnv]

JIRA: https://jira.appcelerator.org/browse/TIMOB-25770

Description:
Fix requestThumbnailAtTimes() for remote content loaded in the VideoPlayer. This change affects loading thumbs for all kind of sources - intents, local content, assets. The test case covers related PRs test examples in order to avoid regression.
Maybe we can have unit test only checking if the callback of the requestThumbnailAtTimes is called successfully?

Test case:
app.js

var win = Ti.UI.createWindow({layout:'vertical'}),
	buttonCamera = Ti.UI.createButton({title: "Camera"}),
	buttonGallery = Ti.UI.createButton({title: "Gallery"}),
	buttonLocalURL = Ti.UI.createButton({title: "Local"}),
	buttonRemoteURL = Ti.UI.createButton({title: "Remote"}),
	buttonLayout = Ti.UI.createView({bottom: 20, layout:'horizontal'}),
	slider = Ti.UI.createSlider({top: 30, backgroundColor: 'gray', min: 0, max: 100, width: '100%', touchEnabled: false, enabled: false}),
	videoPlayer = Ti.Media.createVideoPlayer({top: 20, height:'30%', autoplay: false}),
	imageView = Ti.UI.createImageView({top: 20, height:'30%'}),
	updatingThumbnail = false;

buttonLayout.add([buttonCamera, buttonGallery, buttonLocalURL, buttonRemoteURL]);
win.add(videoPlayer);
win.add(imageView);
win.add(slider);
win.add(buttonLayout);
win.open();

slider.addEventListener('change', function(e) {
	if (videoPlayer && e.value > 0 && !updatingThumbnail) {
	    updatingThumbnail = true;
		videoPlayer.requestThumbnailImagesAtTimes([e.value], Ti.Media.VIDEO_TIME_OPTION_NEAREST_KEYFRAME, function(response) {
			imageView.image = response.image;
			updatingThumbnail = false;
		});
	}
});

videoPlayer.addEventListener('durationavailable', function() {
	enableGetThumbSlider();
});

buttonCamera.addEventListener('click', recordVideo);

function recordVideo() {
	disableGetThumbSlider();
    var permissionsToRequest = [];
	var cameraPermission = "android.permission.CAMERA";
    var hasCameraPerm = Ti.Android.hasPermission(cameraPermission);
    if (!hasCameraPerm) {
        permissionsToRequest.push(cameraPermission);
    }

    var storagePermission = "android.permission.READ_EXTERNAL_STORAGE";
    var hasStoragePerm = Ti.Android.hasPermission(storagePermission);
    if (!hasStoragePerm) {
        permissionsToRequest.push(storagePermission);
    }

    if(permissionsToRequest.length > 0) {
        Ti.Android.requestPermissions(permissionsToRequest, function (e) {
            if (e.success) {
                showCamera();
            }
        });
    } else {
        showCamera();
    }
}

function showCamera() {
    Ti.Media.showCamera({
        autohide: false,
        animated: false,
        allowEditing: false,
        success:function(event) {
            videoPlayer.url = event.media.nativePath;
        },
        cancel:function() {
            console.log("cancel");
        },
        error:function(error) {
            console.log("error");
            console.log(error);
        },
        mediaTypes: [Ti.Media.MEDIA_TYPE_VIDEO],
    });
}

buttonLocalURL.addEventListener("click", function() {
	disableGetThumbSlider();
	videoPlayer.url = 'BigBuckBunny_320x180.mp4';
});

buttonRemoteURL.addEventListener("click", function() {
	disableGetThumbSlider();
	videoPlayer.url = 'http://ve-ep.ember.ltd/assets/media/qa/samplevideo-1280x720-5mb.mp4';
});

buttonGallery.addEventListener("click", function() {
	disableGetThumbSlider();
	var intent = Ti.Android.createIntent({
		action: Ti.Android.ACTION_PICK,
		type: "video/*"
	});
	intent.addCategory(Ti.Android.CATEGORY_DEFAULT);
	win.getActivity().startActivityForResult(intent, function(e) {
	    if (e.intent != null) {
            videoPlayer.url = e.intent.data;
		}
	});
});

function disableGetThumbSlider() {
	slider.touchEnabled = false;
	slider.enabled = false;
}

function enableGetThumbSlider() {
	slider.touchEnabled = true;
	slider.enabled = true;
}

The sample video should be put under Resources of the app folder and in the Downloads folder of the device.
Video: http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_320x180.mp4

[build]

	Messages
📖	👍 Hey!, You deleted more code than you added. That's awesome!
📖	💾 Here's the generated SDK zipfile.

Generated by 🚫 dangerJS

[garymathews]

CR: PASS

[ssjsamir]

FR Passed: Was able to get a thumbnail for remote content.

Test steps:

• Used the generated SDK above to build the PR
• Copied the code from the test case above in to the a Titanium project
• Replaced the link in the test case as it was dead; replaced with http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_320x180.mp4
• Ran the program
• Clicked remote content
• was able to select a thumbnail using the scroll bar
• Was able to verify thumbnails on other options as well (Local content, gallery and camera)

Test Environment
APPC Studio: 5.0.0.201711280737
APPC CLI: 7.0.1
Device: Nexus 6p (8.1.0)
Operating System Name: Mac OS High Sierra
Operating System Version: 10.13
Node.js Version: 8.9.1