[TIMOB-27850] Android: App/Module builds fail with JDK 14 as of 9.0.0

*Summary:* When building an app or module with Titanium 9.0.0, the build will fail if JDK 14 is installed. Titanium 8.3.x builds fine with JDK 14... except for Hyperloop builds: [TIMOB-27780] *Steps to reproduce:*

Install JDK 14.

Create a Titanium app project.

Build with Titanium 9.0.1 for Android. (9.0.1 supports JDK 13.)

*Result:*

[ERROR] [GRADLE] 
[ERROR] [GRADLE] FAILURE: Build failed with an exception.
[ERROR] [GRADLE] 
[ERROR] [GRADLE] * What went wrong:
[ERROR] [GRADLE] Could not initialize class org.codehaus.groovy.runtime.InvokerHelper
[ERROR] [GRADLE] 
[ERROR] [GRADLE] * Try:
[ERROR] [GRADLE] Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
[ERROR] [GRADLE] 
[ERROR] [GRADLE] * Get more help at https://help.gradle.org
[ERROR] [GRADLE] 
[ERROR] [GRADLE] BUILD FAILED in 597ms
[ERROR] "gradlew" tool returned exit code: 1

*Cause:* As of Titanium 9.0.0, we now build with gradle. We need to upgrade gradle to v6.3.0 which recently added JDK 14 support. https://docs.gradle.org/6.3/release-notes.html *To-Do:* In folder titanium_mobile/android, execute below command line to upgrade gradle wrapper files.

./gradlew wrapper --distribution-type all --gradle-version 6.3

We should also update our com.android.tools.build:gradle tool to version 3.6.2 for files... https://github.com/appcelerator/titanium_mobile/blob/master/android/build.gradle https://github.com/appcelerator/titanium_mobile/blob/master/android/templates/build/root.build.gradle *Note:* You can have multiple JDK installations on Mac. You can list the JDK versions installed by entering the following at the command line.

/usr/libexec/java_home -V

You can select which installed JDK version to use by entering the following at the command line. You'll need to set the <JavaVersion> to what's installed, which the above command line will list. The below can be set in your .bash_profile file.

export JAVA_HOME=$(/usr/libexec/java_home -v <JavaVersion>)

*Work-Around:* Downgrade to JDK 13 for Titanium 9.0.1. Downgrade to JDK 12 for Titanium 9.0.0. (See [TIMOB-27781]) (JDK 8 is the min version needed.)