Remove framework-connectivity-annotations library

This library can be removed because the annotations are no longer
used out of module.

@RestrictBackgroundStatus and @MultipathPreference are defined
in connectivity mainline module. Annotate these in non-updatable
platform is not going to be manageable long term. For example,
if the module gets updated and the annotation gets more values
then it's a problem in non-updatable platform. So, it should
not have IntDef cross module boundaries.

Ignore-AOSP-First: AOSP doesn't include this change yet
Bug: 183972925
Test: build
Change-Id: I63f1fde73c4ffdaff9fda914e33cbb5a110ba64e

framework/Android.bp

@@ -55,22 +55,6 @@ filegroup {
     ],
 }
 
-java_library {
-    name: "framework-connectivity-annotations",
-    sdk_version: "module_current",
-    srcs: [
-        "src/android/net/ConnectivityAnnotations.java",
-    ],
-    libs: [
-        "framework-annotations-lib",
-        "framework-connectivity",
-    ],
-    visibility: [
-        "//frameworks/base:__subpackages__",
-        "//packages/modules/Connectivity:__subpackages__",
-    ],
-}
-
 java_sdk_library {
     name: "framework-connectivity",
     sdk_version: "module_current",