Use NINJA_GOALS as the default in non kati builds

Generated ninja in `m` and `m --soong-only` create two default ninja
targets
- droid
- blueprint_tests

However, `m` only builds droid by virtue of adding `droid` (NINJA_GOALS
from build/make/core/ninja_config.mk) to the ninja execution.

This CL adds `NINJA_GOALS` to Soong_ui's NinjaArgs even in skipKati
mode.

Test: Looked at out/soong.log to verify that `droid` is passed to the
ninja execution in m --soong-only
Bug: 393393003
Test: m --no-skip-soong-tests # runs all tests
Test: m --no-skip-soong-tests --no-soong-only # runs all tests

Change-Id: I9fe4a52ce08ad9e257ad7e57db8637668d611948