fix(android): Set WEBVIEW_SERVER_URL before injecting native-bridge

[WIStudent]

According to the docs Capacitor.convertFileSrc should return an URL starting with http://localhost on android, but instead this part is missing and something like /_capacitor_file_/path/to/device/file is returned. convertFileSrc gets the host part from webviewServerUrl, which is set when native-bridge is loaded:

capacitor/core/native-bridge.ts

Lines 356 to 357 in ca4e3b6

	const webviewServerUrl =
	typeof win.WEBVIEW_SERVER_URL === 'string' ? win.WEBVIEW_SERVER_URL : '';

Because of the injection order, win.WEBVIEW_SERVER_URL has not been set yet when this line is executed. This PR fixes that by injecting the part that sets WEBVIEW_SERVER_URL before native-bridge.

[jcesarmobile]

good catch and thanks for the PR!

Can you only change the getScriptString function and not all function params?

Since they are public it would be a breaking change if somebody is using them internally.

[WIStudent]

Good point, I changed it.

[jcesarmobile]

looks good, thanks!