Don't log Invalidation metrics before booting completed.

Flag: EXEMPT bugfix

I use abtd/runs with this CL to verify that this CL fixes
the boot time regression.

Test result as below:
SystemServerTiming_StartPackageManagerService-mean:486.00

The link to abtd/runs as below:
https://android-build.corp.google.com/test_investigate/invocation/I68600010419379184/test/TR52929803037174313/

Bug: 429069340
Test: Manual test
Change-Id: Ifb88b024c746fffacebe50528af41ecbbe250448