Enable ubsan check flag in build

Ubsan is currently support ARM/ARM64,
so It's OK to enable the build Flag

Test: build test module with flags in Android.bp:
      sanitize: {
          all_undefined: true,
          diag: {
              undefined: true,
          },
      },
BUG:38250996
Change-Id: I37a01b4610132f58315e68335b3c3cdfb148357d

cc/sanitize.go

@@ -285,9 +285,6 @@ func (sanitize *sanitize) flags(ctx ModuleContext, flags Flags) Flags {
 
 	if Bool(sanitize.Properties.Sanitize.All_undefined) {
 		sanitizers = append(sanitizers, "undefined")
-		if ctx.Device() {
-			ctx.ModuleErrorf("ubsan is not yet supported on the device")
-		}
 	} else {
 		if Bool(sanitize.Properties.Sanitize.Undefined) {
 			sanitizers = append(sanitizers,