Switch service-permissions to java_sdk_library

(partial cherry-pick)

Previously, the droidstubs generated the system-server API into the
current.txt and removed.txt files which are usually associated with the
public API surface. This change moves that specification into the
system-server....txt files and verifies that no public APIs are leaking
into the stubs.

Bug: 155164730
Test: m java
Merged-In: I907533c36dcb6c0ef679b0098d497d88476d8b95
Change-Id: I907533c36dcb6c0ef679b0098d497d88476d8b95