Set the usesNonSdk manifest attribute whan targeting module SDKs.

From an ART perspective, calling module-lib APIs requires the
ability to bypass hiddenapi enforcement entirely. This CL ensures
that if an APK compiles against module-lib APIs, it will be able
to call those APIs. Currently, compiling against module-lib APIs
is not safe because APKs that are subject to hiddenapi protection
will crash at runtime.

Bug: 181309531
Test: made NetworkStackNext compile against module-current, and:
Test: aapt dump xmltree .../NetworkStackNext.apk AndroidManifest.xml | grep usesNonSdk
Change-Id: I5ca3328c64412078d803e0e3ffa1d8383602416f