Remove ndk_platform backend. Use the ndk backend.

The ndk_platform backend will soon be deprecated because the ndk backend
can serve the same purpose. This is to eliminate the confusion about
having two variants (ndk and ndk_platform) for the same ndk backend.

Bug: 161456198
Test: m
Change-Id: Ib2af857ab464bc03c3ef04a42790ae632854577a
diff --git a/automotive/vehicle/aidl/impl/Android.bp b/automotive/vehicle/aidl/impl/Android.bp
index a97d544..fc3d40b 100644
--- a/automotive/vehicle/aidl/impl/Android.bp
+++ b/automotive/vehicle/aidl/impl/Android.bp
@@ -21,7 +21,7 @@
 cc_defaults {
     name: "VehicleHalDefaults",
     static_libs: [
-        "android.hardware.automotive.vehicle-V1-ndk_platform",
+        "android.hardware.automotive.vehicle-V1-ndk",
     ],
     shared_libs: [
         "libbase",