Enable removable drives and sharing app offline in release builds.

briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt

@@ -95,7 +95,5 @@ internal class HeadlessModule(private val appDir: File) {
         override fun shouldEnableImageAttachments() = false
         override fun shouldEnableProfilePictures() = false
         override fun shouldEnableDisappearingMessages() = false
-        override fun shouldEnableTransferData() = false
-        override fun shouldEnableShareAppViaOfflineHotspot() = false
     }
 }