Deprecate android_is_in_vendor_process

android_is_in_vnedor_process previously checked if current process is in
system(-ish) section by trying to open vndk namespace. However, this
would not work once VNDK is deprecated. As there is no clear way to
replace this, and there is few usage on this API, it would be better
deprecated, and be implemented from each module if required.

Bug: 300366609
Test: AOSP CF build and boot succeeded
Change-Id: I70c70efb36199e12d4877ea4ecb39dbf94653551

libvndksupport/include/vndksupport/linker.h

@@ -20,15 +20,8 @@
 extern "C" {
 #endif
 
-/*
+int android_is_in_vendor_process() __attribute__((
- * Returns whether the current process is a vendor process.
+        deprecated("This function would not give exact result if VNDK is deprecated.")));
- *
- * Note that this is only checking what process is running and has nothing to
- * do with what namespace the caller is loaded at.  For example, a VNDK-SP
- * library loaded by SP-HAL calling this function may still get a 'false',
- * because it is running in a system process.
- */
-int android_is_in_vendor_process();
 
 void* android_load_sphal_library(const char* name, int flag);
 

libvndksupport/libvndksupport.map.txt

@@ -1,6 +1,6 @@
 LIBVNDKSUPPORT {
   global:
-    android_is_in_vendor_process; # llndk systemapi
+    android_is_in_vendor_process; # systemapi
     android_load_sphal_library; # llndk systemapi
     android_unload_sphal_library; # llndk systemapi
   local: