android: profile import as an Expressive bottom sheet in a transparent host

src/frontends/android/app/src/main/AndroidManifest.xml

@@ -149,7 +149,7 @@
         <activity
             android:name=".ui.VpnProfileImportActivity"
             android:label="@string/profile_import"
-            android:theme="@style/ApplicationTheme.ActionBar"
+            android:theme="@style/TransparentActivity"
             android:taskAffinity=""
             android:excludeFromRecents="true"
             android:exported="true">