Note that this support is highly experimental. Currently, a few issues
remain to be solved:
* Prebuilt libraries are needed for zxing and asn1bean. This will be
pushed as a separate repository that can be included in the prebuilts/
directory.
* The TelephonyManagerHiddenApi class needs to be excluded in AOSP
builds
* In order to support multiple AOSP versions, the OpenEuiccService class
needs to be turned into a custom interface with a default impl, and
then we need to introduce impls for the system EuiccService depending
on which version of AOSP we are building on. This could be kind of
problematic, and I'm not sure whether we should do this yet.