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: I0652f1efe920111d79dd8c2ecd52e55dda54538f
diff --git a/gnss/1.1/default/Android.bp b/gnss/1.1/default/Android.bp
index ab87990..3c9c29a 100644
--- a/gnss/1.1/default/Android.bp
+++ b/gnss/1.1/default/Android.bp
@@ -27,7 +27,7 @@
         "android.hardware.gnss@2.0",
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@1.0",
-        "android.hardware.gnss-V1-ndk_platform",
+        "android.hardware.gnss-V1-ndk",
     ],
     static_libs: [
         "android.hardware.gnss@common-default-lib",