fix ccache not being used by soong, bump cache to 200G

Description

fix ccache not being used by soong, bump cache to 200G

Issue(s)

https://gitlab.e.foundation/e/devices/backlog/-/issues/1745

Test procedures

• Triggered an A16 build and checked pipeline log, it now shows ccache usage, validating working of ccache.

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation