Crash IllegalArgumentException: Unsupported URI scheme when downloading icon

[ekager]

Originally reported here: mozilla-mobile/fenix#10880

Steps to reproduce

Visit https://www.gruppoapi.com/ricerca-stazioni-servizio

2020-05-27 20:00:14.677 9383-9590/org.mozilla.fenix.debug D/HttpIconLoader: IllegalArgumentException while trying to download icon resource https://www.gruppoapi.com/ricerca-stazioni-servizio/images/logo-gruppoapi-shared.png

java.lang.IllegalArgumentException: Unsupported URI scheme
    at org.mozilla.geckoview.GeckoWebExecutor.fetch(GeckoWebExecutor.java:128)
    at mozilla.components.browser.engine.gecko.fetch.GeckoViewFetchClient.fetch(GeckoViewFetchClient.kt:64)
    at mozilla.components.browser.icons.loader.HttpIconLoader.load(HttpIconLoader.kt:54)
    at mozilla.components.browser.icons.BrowserIconsKt.load(BrowserIcons.kt:276)
    at mozilla.components.browser.icons.BrowserIconsKt.access$load(BrowserIcons.kt:1)
    at mozilla.components.browser.icons.BrowserIcons.loadIconInternal(BrowserIcons.kt:127)
    at mozilla.components.browser.icons.BrowserIcons.access$loadIconInternal(BrowserIcons.kt:77)
    at mozilla.components.browser.icons.BrowserIcons$loadIcon$1.invokeSuspend(BrowserIcons.kt:110)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    at java.lang.Thread.run(Thread.java:919)

I confirmed catching the IllegalArgumentException in HttpIconLoader fixes this, which we should probably do because crashing on fetching icons seems silly, but I thought this was interesting to bring up before catching it because it's unclear to me why this website would be an Unsupported URI scheme.

┆Issue is synchronized with this Jira Task

[Amejia481]

The url contains breaking line "https://www.gruppoapi.com/ricerca-stazioni-servizio/images/logo-gruppoapi-shared.png\n" character causing https://dxr.mozilla.org/mozilla-central/source/mobile/android/geckoview/src/main/java/org/mozilla/geckoview/GeckoWebExecutor.java#127 to break

[Amejia481]

Sentry crash https://sentry.prod.mozaws.net/operations/fenix-nightly/issues/8443650/?query=is%3Aunresolved