Revert "🔥 Remove the manual gradle installation"

This reverts commit 399e9e7.

I _thought_ this wasn't needed because cordova configures `build.gradle` so
that the correct version of gradle is downloaded and installed on the first
run.

However, when I tried to rebuild on a fresh installation, I got the following error

```
Using Android SDK: /Users/kshankar/Library/Android/sdk
Could not find an installed version of Gradle either in Android Studio,
or on your system to install the gradle wrapper. Please include gradle
in your path, or install Android Studio
```

It looks like although cordova installs gradle, the system needs to have a
version of gradle installed as well to bootstrap the gradle wrapper.

This error doesn't show up in the CI/CD pipeline because the CI environment has
gradle installed.

@catarial did you encounter this during your setup as well?! Or maybe it has
not been an issue so far because you are focused on the iOS build.

setup/activate_native.sh

@@ -10,6 +10,9 @@ then
     echo "ANDROID_HOME and ANDROID_SDK_ROOT not set, android SDK not found"
 fi
 
+echo "Activating sdkman, and by default, gradle"
+source ~/.sdkman/bin/sdkman-init.sh
+
 echo "Ensuring that we use the most recent version of the command line tools"
 export PATH=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin:$ANDROID_SDK_ROOT/emulator:$PATH
 

setup/export_shared_dep_versions.sh

@@ -6,6 +6,7 @@ export NODE_VERSION=20.9.0
 # Looks like brew supports only major and minor, not patch version
 export RUBY_VERSION=3.0
 export COCOAPODS_VERSION=1.15.2
+export GRADLE_VERSION=8.10
 export OSX_EXP_VERSION=12
 
 export NVM_DIR="$HOME/.nvm"

setup/setup_android_native.sh

@@ -27,4 +27,19 @@ else
     echo "ANDROID_HOME = $ANDROID_HOME; ANDROID_SDK_ROOT=$ANDROID_SDK_ROOT"
 fi
 
+echo "Setting up sdkman"
+curl -s "https://get.sdkman.io" | bash
+source ~/.sdkman/bin/sdkman-init.sh
+
+CURR_GRADLE_VER=`sdk current gradle | cut -d " " -f 4 | xargs`
+
+echo "CURR_GRADLE_VER = '$CURR_GRADLE_VER', expected $GRADLE_VERSION"
+
+if [[ $CURR_GRADLE_VER == $GRADLE_VERSION ]]; then
+    echo "Already have gradle version $GRADLE_VERSION"
+else
+    echo "Setting up gradle using SDKMan"
+    sdk install gradle $GRADLE_VERSION
+fi
+
 source setup/setup_shared_native.sh