Merge changes I4d0b27ba,Ic48e9cf2 into main

* changes:
  Fix soong_ui file rlimits for go 1.21
  Fix TestReverseSlice for go 1.21

android/util_test.go

@@ -811,7 +811,7 @@ func TestReverseSlice(t *testing.T) {
 			if !reflect.DeepEqual(slice, testCase.expected) {
 				t.Errorf("expected %#v, got %#v", testCase.expected, slice)
 			}
-			if slice != nil && unsafe.SliceData(testCase.in) == unsafe.SliceData(slice) {
+			if cap(slice) > 0 && unsafe.SliceData(testCase.in) == unsafe.SliceData(slice) {
 				t.Errorf("expected slices to have different backing arrays")
 			}
 		})

cmd/soong_ui/main.go

@@ -692,9 +692,11 @@ func setMaxFiles(ctx build.Context) {
 	}
 
 	ctx.Verbosef("Current file limits: %d soft, %d hard", limits.Cur, limits.Max)
-	if limits.Cur == limits.Max {
-		return
-	}
+
+	// Go 1.21 modifies the file limit but restores the original when
+	// execing subprocesses if it hasn't be overridden.  Call Setrlimit
+	// here even if it doesn't appear to be necessary so that the
+	// syscall package considers it set.
 
 	limits.Cur = limits.Max
 	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &limits)