fix(android): move WebView contants into correct file

[m1ga]

while adding constants to the #14172 PR I found out that the current contants for createPDF are in the wrong file. This PR will move them so you can use them with Ti.UI.WebView.PDF_PAGE_DIN_A5

// output all values
console.log(Ti.UI.WebView.PDF_PAGE_AUTO);
console.log(Ti.UI.WebView.PDF_PAGE_DIN_A5);
console.log(Ti.UI.WebView.PDF_PAGE_DIN_A4);
console.log(Ti.UI.WebView.PDF_PAGE_DIN_A3);
console.log(Ti.UI.WebView.PDF_PAGE_DIN_A2);
console.log(Ti.UI.WebView.PDF_PAGE_DIN_A1);

const window = Ti.UI.createWindow();
const www = Ti.UI.createWebView({url: "https://tidev.io"});
const btn = Ti.UI.createButton({title: "create pdf", top: 10});
window.add([www, btn]);
window.open();

btn.addEventListener("click", function() {
	if (OS_ANDROID) {
		www.createPDF({
			pageSize: Ti.UI.WebView.PDF_PAGE_DIN_A4,
			success: function(e) {

				winImageFile = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, "test.pdf");
				winImageFile.write(e.data);

				var igIntent = Ti.Android.createIntent({
					action: Ti.Android.ACTION_SEND,
					type: "application/pdf"
				});
				igIntent.putExtraUri(Titanium.Android.EXTRA_STREAM,winImageFile.nativePath);
				Ti.Android.currentActivity.startActivity(igIntent);


			}
		})
	}
})

Test
Run the code, wait until the page is loaded and press "create pdf". It should show a share dialog and when you view the PDF it size should be A4