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: Ibeb4178f99857be75bb5f83a073a2d679058d921
diff --git a/identity/Android.bp b/identity/Android.bp
index 8267a6b..ecdf9a4 100644
--- a/identity/Android.bp
+++ b/identity/Android.bp
@@ -48,8 +48,8 @@
         "android.hardware.identity-support-lib",
         "libkeymaster4support",
         "libkeystore-attestation-application-id",
-        "android.hardware.security.keymint-V1-ndk_platform",
-        "android.security.authorization-ndk_platform",
+        "android.hardware.security.keymint-V1-ndk",
+        "android.security.authorization-ndk",
     ],
     static_libs: [
         "android.hardware.identity-V3-cpp",