After applies issue 78613232 patch (create symlink in init.rc),
we found device boots to home screen fail.
When device is FDE (Full Disk Encryption) and user sets the
Password/Pattern/PIN to lock phone and then reboot the device,
data partition will be mounted as tmpfs (256MB) until device
is unlocked after user inputs Password/Pattern/PIN.
During device boot-up process, PMS (Package Manager Service) will
execute requestCopyPreoptedFiles when device first boots, and it
may cause device fails to boot to home screen because PMS copies
larger system_b (about 500MB) to smaller tmpfs (tmpfs is only 256MB)
before device is decrypted.
We suggest that PMS doesn't execute requestCopyPreoptedFiles when
device is undecrypted during first boot.
Bug: 78613232
Test: Device boot up to launcher normally.
Test: APPs work normally after A/B upgrade.
Change-Id: I893e0e217a59577299e97adfbf5dc7762dffda7c
cd5dd3c7b5