InputMapper refactor: Change readerconfig pointer to const ref

We are refactoring Input-mapper to ensure they are configured at the
time of initialisation.

In this CL we are changing InputReaderConfiguration raw pointer to
a const reference and rename it to readerConfig for clarity.

Test: build, inputflinger_tests, presubmit checks

Bug: 256009910
Change-Id: Iae22c8cfba836bd311a51fca13d680456a61e604
diff --git a/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp b/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp
index 14cb8a5..00b44b5 100644
--- a/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/KeyboardInputFuzzer.cpp
@@ -64,7 +64,7 @@
                 [&]() -> void { mapper.getSources(); },
                 [&]() -> void {
                     std::list<NotifyArgs> unused =
-                            mapper.reconfigure(fdp->ConsumeIntegral<nsecs_t>(), &policyConfig,
+                            mapper.reconfigure(fdp->ConsumeIntegral<nsecs_t>(), policyConfig,
                                                fdp->ConsumeIntegral<uint32_t>());
                 },
                 [&]() -> void {