qa: Ensure NDK and cmake are present

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

.github/workflows/qa.yml

@@ -19,6 +19,8 @@ jobs:
                 with:
                     distribution: "temurin"
                     java-version: 11
+            -   name: Install NDK and cmake
+                run: /usr/local/lib/android/sdk/tools/bin/sdkmanager 'ndk;21.4.7075529' 'cmake;3.18.1'
             -   name: Build QA
                 if: ${{ steps.check-secrets.outputs.ok == 'true' }}
                 env: