Add androidTargetSdkVersion as an option to update the Android SDK (#298)

* Add androidTargetSdkVersion as an option to update the Android SDK API level

* Fix build script

* Update default value

* Add JAVA_HOME

* Use Unity_path

* Update src/model/android-versioning.test.ts

Co-authored-by: Webber Takken <webber@takken.io>

* Correct JAVA_HOME

* Use unity_path

* Update JAVA_HOME to use path found from 2020.3

* Dynamically determine JAVA_HOME

* Update path determination

Co-authored-by: Webber Takken <webber@takken.io>

src/model/docker.ts

@@ -35,6 +35,8 @@ class Docker {
       androidKeystorePass,
       androidKeyaliasName,
       androidKeyaliasPass,
+      androidTargetSdkVersion,
+      androidSdkManagerParameters,
       customParameters,
       sshAgent,
       gitPrivateToken,
@@ -64,6 +66,8 @@ class Docker {
         --env ANDROID_KEYSTORE_PASS="${androidKeystorePass}" \
         --env ANDROID_KEYALIAS_NAME="${androidKeyaliasName}" \
         --env ANDROID_KEYALIAS_PASS="${androidKeyaliasPass}" \
+        --env ANDROID_TARGET_SDK_VERSION="${androidTargetSdkVersion}" \
+        --env ANDROID_SDK_MANAGER_PARAMETERS="${androidSdkManagerParameters}" \
         --env CUSTOM_PARAMETERS="${customParameters}" \
         --env CHOWN_FILES_TO="${chownFilesTo}" \
         --env GITHUB_REF \