libbinder_ndk: rename cpp files like headers

binder_$1.h -> $1.cpp

This change is being made in order to prepare to add more files
representing statuses. Since there will be no AStatus type, it doesn't
make sense to make a file called that. If it was named just status,
then it would stand out.

Bug: 111445392
Test: runtests.sh
Change-Id: I6d27dabe4392af6078a4c8d69545fda8c2c2e1da
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index 76d5a73..e5c68b5 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -24,10 +24,10 @@
     ],
 
     srcs: [
-        "ABinderProcess.cpp",
-        "AIBinder.cpp",
-        "AParcel.cpp",
-        "AServiceManager.cpp",
+        "ibinder.cpp",
+        "parcel.cpp",
+        "process.cpp",
+        "service_manager.cpp",
     ],
 
     shared_libs: [