Disable asan for x86 build of libRSDriver

Bug: http://b/77445194

For asan on x86, rsdRuntimeStubs.cpp has undefined reference to
half-conversion routines (__gnu_h2f_ieee, __gnu_f2h_ieee).  This happens
only when asan is enabled.  There shouldn't be any need for a conversion
here, as the function just passes through the 16-bit version of the
half.  Disabling asan until we can investigate and submit a fix upstream.

Test: make PRODUCT-aosp_x86-userdebug && \
      make PRODUCT-aosp_x86-userdebug SANITIZE_TARGET='address'

Change-Id: Ic4f0da15fcc6d72f49b22520223935452d4873d6
diff --git a/Android.bp b/Android.bp
index 0877752..45d512b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -73,6 +73,17 @@
             enabled: false,
         },
     },
+
+    // Bug: http://b/77445194 - Disable x86 asan where rsdRuntimeStubs.cpp has
+    // undefined reference to half-conversion routines (__gnu_h2f_ieee,
+    // __gnu_f2h_ieee).
+    arch: {
+        x86: {
+            sanitize: {
+                never: true,
+            },
+        },
+    },
 }
 
 // Build rsg-generator ====================