chore: Fix Github CI builds by removing NDK r22 (#516)

See #517 for explanation
An update to the Github Action virtual environment added NDK r22,
which CMake uses, ignoring $ANDROID_NDK_HOME.
Solution: Remove NDK r22 and update to latest NDK r21f

.github/workflows/android.yml

@@ -37,6 +37,9 @@ jobs:
       #     mv android-ndk-r${ANDROID_NDK_VERSION} $ANDROID_NDK_HOME
       #     ls -al $ANDROID_NDK_HOME
       #     cat $ANDROID_NDK_HOME/source.properties
+      - name: Delete newer NDK version
+        run: |
+          rm -rf $ANDROID_HOME/ndk/22*
       - name: Download Android Emulator Image
         run: |
           sdkmanager --update | grep -v = || true

android/build.gradle

@@ -10,7 +10,7 @@ buildscript {
         supportLibVersion = "29.0.0"
         // Kotlin is needed by Detox testing framework
         kotlinVersion = "1.3.50"
-        ndkVersion = "21.3.6528147"
+        ndkVersion = "21.4.7075529"
     }
     repositories {
         google()

bitrise.yml

@@ -283,11 +283,13 @@ workflows:
                 # debug log
                 set -x
 
-                ANDROID_NDK_VERSION='21.3.6528147'
+                ANDROID_NDK_VERSION='21.4.7075529'
 
                 echo '### User Sources for Android SDK Manager' > $HOME/.android/repositories.cfg
                 yes | sdkmanager --licenses
                 sdkmanager --update | grep -v = || true
+                # Remove NDK r22 (can cause builds to fail)
+                rm -rf $ANDROID_HOME/ndk/22*
                 sdkmanager --install "ndk;${ANDROID_NDK_VERSION}"
 
                 echo "Updated to latest SDK:"