Remove non-updatable-* prefix from .txt files

The services/api/{current,removed,lint-baseline}.txt files used to
contain information for the merged system server stubs. Those files are
now created by the rules in api/Android.bp
('services-system-server-current.txt' and 'services-system-server-removed.txt').

Test: m checkapi
Bug: 177640454
Change-Id: I365be0a45126a6a056d5219e24ef93020c034c87
diff --git a/services/api/Android.bp b/services/api/Android.bp
index bbc8c72..ee7d49f 100644
--- a/services/api/Android.bp
+++ b/services/api/Android.bp
@@ -24,12 +24,12 @@
 
 filegroup {
     name: "non-updatable-system-server-current.txt",
-    srcs: ["non-updatable-current.txt"],
+    srcs: ["current.txt"],
     visibility: ["//frameworks/base/api"],
 }
 
 filegroup {
     name: "non-updatable-system-server-removed.txt",
-    srcs: ["non-updatable-removed.txt"],
+    srcs: ["removed.txt"],
     visibility: ["//frameworks/base/api"],
 }