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
Merged-In: I674244ff9b873d3779d3d649822389ad441fa0af
Change-Id: I612a89cb553f858a62f9e92e4bcd8455c6acab80

services/core/jni/Android.bp

@@ -158,7 +158,7 @@ cc_defaults {
         "android.hardware.input.classifier@1.0",
         "android.hardware.ir@1.0",
         "android.hardware.light@2.0",
-        "android.hardware.memtrack-V1-ndk_platform",
+        "android.hardware.memtrack-V1-ndk",
         "android.hardware.power@1.0",
         "android.hardware.power@1.1",
         "android.hardware.power-V1-cpp",