Extend PackageInfoNative to include sourceDir

This is the equivalent of getPackageCodePath() exposed by PM. This is
needed by AVF client code to find the path corresponding to package
name mentioned in (server side) signed configurations.

Requirement: virtualizationmachine service which uses native pm consumes
VM configuration supposed to contain the packagename of the apk. It
requires sourceDir of the apk to mount the package into Microdroid VM.

Test: adb shell service call package_native 2 s16 "com.android.microdroid.test" i32 0
Test: Compare above with `adb shell pm path com.android.microdroid.test`
Bug: 438179019
Flag: build.RELEASE_AVF_ENABLE_ADVANCE_MULTITENANCY
Change-Id: I1f47cb83aa238ba7d1e3d8a105793acd38277f6e