manager: Delay UI Call removal and adjust to changes

This was handled explicitly in the Call window.
By changing the logic to delay the emission of "ui-call-removed" we make sure
that the Call UI and the exported DBus object is consistent.

We also need to change the test cases to use run a GMainLoop because we now have
to wait until signal comes in.

tests/meson.build

@@ -24,6 +24,11 @@ test_link_args = [
   '-fPIC',
 ]
 
+mock_link_args = [ test_link_args,
+                   '-Wl,--wrap=calls_contacts_provider_new',
+                 ]
+
+
 tests = [
   [ 'provider', []                       ],
   [ 'origin',   [ 'provider' ]           ],
@@ -63,7 +68,7 @@ test_sources = [ 'test-manager.c' ]
 
 t = executable('manager', test_sources,
                  c_args : test_cflags,
-                 link_args: test_link_args,
+                 link_args: mock_link_args,
                  pie: true,
                  link_with : [calls_vala, libcalls],
                  dependencies: calls_deps,
@@ -115,10 +120,6 @@ t = executable('util', test_sources,
                )
 test('util', t, env: test_env)
 
-mock_link_args = [ test_link_args,
-                   '-Wl,--wrap=calls_contacts_provider_new',
-                 ]
-
 test_sources = [ 'test-ui-call.c', 'mock-call.c', 'mock-call.h' ]
 t = executable('ui-call', test_sources,
                c_args : test_cflags,