Use -Werror in hardware/interfaces

* Use hidl_defaults, which has -Wall -Werror.

Bug: 66996870
Test: build with WITH_TIDY=1
Change-Id: Ifbca0e176a8e031acc27256eb46d23b89cdf1a0e
diff --git a/thermal/1.0/default/Android.bp b/thermal/1.0/default/Android.bp
index 2054b88..9d81474 100644
--- a/thermal/1.0/default/Android.bp
+++ b/thermal/1.0/default/Android.bp
@@ -34,6 +34,7 @@
 
 cc_binary {
     name: "android.hardware.thermal@1.0-service",
+    defaults: ["hidl_defaults"],
     relative_install_path: "hw",
     vendor: true,
     init_rc: ["android.hardware.thermal@1.0-service.rc"],