More extreme method for enforcing WebView availability

(cherry picked from commit 6cd34614f6)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/App.kt

app/src/main/AndroidManifest.xml

@@ -49,6 +49,11 @@
                 android:name="android.app.shortcuts"
                 android:resource="@xml/shortcuts" />
         </activity>
+        <activity
+            android:name=".ui.main.ForceCloseActivity"
+            android:clearTaskOnLaunch="true"
+            android:noHistory="true"
+            android:theme="@android:style/Theme.NoDisplay" />
         <activity
             android:name=".ui.main.DeepLinkActivity"
             android:launchMode="singleTask"