InputMapper refactor: Configure empty InputDevice

Configure the Device prior to populating mappers for mappers to
receive correct property map

Test: atest inputflinger_tests
Bug: 256009910
Change-Id: I4dc6210bbc3ed6bf3749b2ad9a9f7adcc9a73df1
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index aab8a47..7d157f6 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -2584,7 +2584,8 @@
     mFakeEventHub->addDevice(TEST_EVENTHUB_ID, "Test EventHub device", InputDeviceClass::BATTERY);
 
     InputDevice device(mReader->getContext(), /*id=*/1, /*generation=*/2, /*identifier=*/{});
-    device.addEventHubDevice(TEST_EVENTHUB_ID, mFakePolicy->getReaderConfiguration());
+    auto _ = device.addEventHubDevice(ARBITRARY_TIME, TEST_EVENTHUB_ID,
+                                      mFakePolicy->getReaderConfiguration());
     device.removeEventHubDevice(TEST_EVENTHUB_ID);
     std::string dumpStr, eventHubDevStr;
     device.dump(dumpStr, eventHubDevStr);