fix(mobile): trust the user trust store (Android)

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

@@ -8,7 +8,9 @@
         android:requestLegacyExternalStorage="true"
         android:allowBackup="false"
         android:fullBackupContent="false"
-        android:largeHeap="true">
+        android:largeHeap="true"
+        android:networkSecurityConfig="@xml/network_security_config"    
+    >
 
         <activity android:name=".MainActivity" android:launchMode="singleTask"
             android:theme="@style/LaunchTheme"
@@ -177,4 +179,4 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="com.android.vending.BILLING" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
-</manifest>
+</manifest>

mobile/android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,8 @@
+<network-security-config>
+    <base-config>
+        <trust-anchors>
+            <certificates src="system" />
+            <certificates src="user" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>

mobile/lib/ui/settings/developer_settings_page.dart

@@ -65,7 +65,7 @@ class _DeveloperSettingsPageState extends State<DeveloperSettingsPage> {
                   showErrorDialog(
                     context,
                     S.of(context).invalidEndpoint,
-                    S.of(context).invalidEndpointMessage,
+                    S.of(context).invalidEndpointMessage + "\n" + e.toString(),
                   );
                 }
               },