[installd] Prepare profiles for app code paths

Implement profile preparation for individual application code paths.

The preparation is:
- create the current profile
- merge the profile from the dex metadata file (if present) into the
reference profile.

Note: currently the current profile is created as part of
InstalldNativeService::createAppData for the entire package. That logic
does not support dex metadata or individual code paths and will be removed
once the PackageManager switches over the new method.

(cherry picked from commit bc5ab878)

Test: installd_dexopt_test
Bug: 30934496
Merged-In: I2aeddcda7b78017bd46838985bef5f92a79d4573
Change-Id: I2aeddcda7b78017bd46838985bef5f92a79d4573