Add the skeleton code for People Service which is a new system service with only internal APIs

Change-Id: I78b1b362735d5da40c49a344ae3063ea0df0759f
Bug: 146522621
Test: Code builds and runs successfully
diff --git a/services/tests/servicestests/Android.bp b/services/tests/servicestests/Android.bp
index 015e574f2..48cffa0 100644
--- a/services/tests/servicestests/Android.bp
+++ b/services/tests/servicestests/Android.bp
@@ -26,6 +26,7 @@
         "services.core",
         "services.devicepolicy",
         "services.net",
+        "services.people",
         "services.usage",
         "guava",
         "androidx.test.core",