Increase java heap size to 2 GB

[LivingWithHippos]

Avoid "GC overhead limit exceeded" error while building. If this is not specified it should default to 1 GB, I wasn't able to run tivi without this.

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[LivingWithHippos]

@googlebot I signed it!

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[chrisbanes]

Thanks! I intentionally didn't set this due to the priority order of Gradle handling the jvmargs properties.

Currently, our CI script overrides the max heap to ~5GB using JAVA_TOOL_OPTIONS, but org.gradle.jvmargs in gradle.properties has a higher priority so the env variable is ignored (the same thing happens when using GRADLE_OPTS).

I'll merge this and see what can be done for CI.

[LivingWithHippos]

According to https://docs.gradle.org/current/userguide/build_environment.html command line parameters have higher priority than gradle.properties.
At https://docs.gradle.org/current/userguide/command_line_interface.html#environment_options there's the parameter

-Dorg.gradle.jvmargs

    Set JVM arguments.

maybe this can be useful ;P

[chrisbanes]

Ah yes, thanks for researching 🙌. I went a different way, which I think works better with version control: a0271ec

This allows me to extract the config to a file, which is easier to update separately.