Update PackageSettingBase.usesStaticLibraries correctly.

Change-Id: Ie18f3a621a2a24ee385593454f45d4713ca8bd1f
Fixes: 36844859
Test: manual &&
      android.os.cts.StaticSharedLibsHostTests - Same pass/failures before and after this change &&
      runtest -c com.android.server.pm.PackageManagerSettingsTests#testInsertPackageSetting \
            frameworks-services