libhardware: make audio_alsaops vendor only

Limit AOSP usage of historical HAL implementation interface to
avoid mistakes.

Bug: 37280010
Test: build
Change-Id: Id866d7efadb7081ced8f2c5c80c636c7f3e425dc
diff --git a/include/hardware/audio_alsaops.h b/include/hardware/audio_alsaops.h
deleted file mode 120000
index a3087d2..0000000
--- a/include/hardware/audio_alsaops.h
+++ /dev/null
@@ -1 +0,0 @@
-../../include_all/hardware/audio_alsaops.h
\ No newline at end of file
diff --git a/include_all/hardware/audio_alsaops.h b/include_vendor/hardware/audio_alsaops.h
similarity index 100%
rename from include_all/hardware/audio_alsaops.h
rename to include_vendor/hardware/audio_alsaops.h