CI: iOS workflows clone BitBox without running Android bindings build

build_bindings.sh in bitbox_flutter unconditionally runs
'gomobile bind -target=android -androidapi 24' which produces an
api.aar — needed only for Android. The Mac runner has no Android SDK,
so gomobile fails with 'could not locate Android SDK'.

iOS doesn't need the .aar. BitBox's iOS support is a separate native
plugin under bitbox_flutter/ios/Classes/ + bitbox_flutter.podspec,
linked via flutter pub get + pod install. We just need the directory
present so the path-dep resolves.

Replace the wrapper invocation in iOS workflows with the clone steps
only; skip build_bindings.sh entirely. Android workflow keeps using
the wrapper as-is.

.github/workflows/build-ios-sim.yml

@@ -125,11 +125,23 @@ jobs:
             rm reown_flutter.tar.gz
           popd
 
-      - name: Clone BitBox Flutter
+      - name: Clone BitBox Flutter (iOS — skip Android bindings)
         run: |
+          # Pubspec has bitbox_flutter as a path: dep at scripts/bitbox_flutter,
+          # so the directory must exist for pub get. The bundled build_bindings.sh
+          # runs `gomobile bind -target=android` which needs the Android SDK we
+          # don't have on the Mac runner — and the resulting .aar is Android-only.
+          # iOS uses bitbox_flutter's native ios/Classes plugin, no .aar required.
           set -x -e
           pushd scripts
-            ./build_bitbox_flutter.sh
+            if [[ ! -d bitbox_flutter ]]; then
+              git clone https://github.com/konstantinullrich/bitbox_flutter
+            fi
+            cd bitbox_flutter
+            git fetch -a
+            git reset --hard
+            git checkout 5a6e6dd388ef64003f86094af80d5453518b601d
+            git reset --hard
           popd
 
       # ---- Native crypto cores (monero_c prebuilt bundle) ------------------

.github/workflows/build-ios-testflight.yml

@@ -127,11 +127,20 @@ jobs:
             rm reown_flutter.tar.gz
           popd
 
-      - name: Clone BitBox Flutter
+      - name: Clone BitBox Flutter (iOS — skip Android bindings)
         run: |
+          # See note in build-ios-sim.yml — iOS uses bitbox's native plugin,
+          # not the .aar that build_bindings.sh generates.
           set -x -e
           pushd scripts
-            ./build_bitbox_flutter.sh
+            if [[ ! -d bitbox_flutter ]]; then
+              git clone https://github.com/konstantinullrich/bitbox_flutter
+            fi
+            cd bitbox_flutter
+            git fetch -a
+            git reset --hard
+            git checkout 5a6e6dd388ef64003f86094af80d5453518b601d
+            git reset --hard
           popd
 
       - name: Fetch prebuilt monero_c bundle