[NFCI] Change Android's NT_TYPE to NT_ANDROID_TYPE.

Normally, platform-specific note types in the toolchain are prefixed
with the platform name. Because we're exposing the NT_TYPE_MEMTAG and
synthesizing the note in the toolchain in an upcoming patch
(https://reviews.llvm.org/D118948), it's been requested that we change
the name to include the platform prefix.

While NT_TYPE_IDENT and NT_TYPE_KUSER aren't known about or synthesized
by the toolchain, update those references as well for consistency.

Bug: N/A
Test: Build Android
Change-Id: I7742e4917ae275d59d7984991664ea48028053a1
diff --git a/libc/arch-arm/bionic/kuser_helper_on.S b/libc/arch-arm/bionic/kuser_helper_on.S
index 2a1d86d..08291f7 100644
--- a/libc/arch-arm/bionic/kuser_helper_on.S
+++ b/libc/arch-arm/bionic/kuser_helper_on.S
@@ -32,10 +32,10 @@
   .balign 4
   .type kuser_helper_on, %object
 kuser_helper_on:
-  .long 2f-1f         // int32_t namesz
-  .long 3f-2f         // int32_t descsz
-  .long NT_TYPE_KUSER // int32_t type
-1:.ascii "Android\0"  // char name[]
-2:.long 1             // int32_t on
+  .long 2f-1f                 // int32_t namesz
+  .long 3f-2f                 // int32_t descsz
+  .long NT_ANDROID_TYPE_KUSER // int32_t type
+1:.ascii "Android\0"          // char name[]
+2:.long 1                     // int32_t on
 3:
   .size kuser_helper_on, .-kuser_helper_on