feat(android): open share links from a browser or the share sheet

A drive.proton.me/urls/ link opened from a browser, or text containing
one shared to the app, switches to Shares and opens the Add form with
the link filled in, fragment included. A playing episode moves to the
mini transport instead of covering the form. A recreated activity does
not offer the same link again.

The view filter is not autoVerify, since the domain is Proton's, so
Android only routes browser links here once "Open supported links" is
allowed in the app's settings; sharing works without that.

android/app/src/main/AndroidManifest.xml

@@ -39,6 +39,23 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            <!--
+              Proton Drive public links. Not autoVerify: the domain is Proton's,
+              so Android treats these as unverified and only opens them here
+              once "Open supported links" is allowed in the app's settings.
+              Sharing a link to the app works without that.
+            -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:scheme="https" android:host="drive.proton.me" android:pathPrefix="/urls/" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="text/plain" />
+            </intent-filter>
         </activity>
 
     </application>