[cts] fix user ID in PackageInstallerV2 metrics test

The user who installs the test package should be the same user who runs
the test.

BUG: 188547513
Test: atest com.android.cts.packagemanager.stats.host.PackageInstallerV2StatsTests#testPackageInstallerV2MetricsReported
Change-Id: Iade7a2cda24e94e918fdc8489ade24d05ef72de3
1 file changed