Add <uses-library> information.

Add "org.apache.http.legacy" to explicit `uses_libs`. Soong is able to
infer it from `libs`, but it infers the library as optional rather than
required (because it's one of the optional compatibility libraries).

Bug: 196377222
Test: m out/soong/.intermediates/packages/services/Telephony/testapps/TestRcsApp/TestApp/TestRcsApp/android_common/enforce_uses_libraries.status
Change-Id: Id08795f8d7470cb68dd1f98db63de110d6e3820a
diff --git a/testapps/TestRcsApp/TestApp/Android.bp b/testapps/TestRcsApp/TestApp/Android.bp
index cda7d17..f6ea54a 100644
--- a/testapps/TestRcsApp/TestApp/Android.bp
+++ b/testapps/TestRcsApp/TestApp/Android.bp
@@ -22,6 +22,7 @@
     ],
 
     libs: ["org.apache.http.legacy"],
+    uses_libs: ["org.apache.http.legacy"],
 
     certificate: "platform",
     privileged: true,