Make the enabled property configurable

This allows using select statements with it.

Bug: 323382414
Test: m nothing --no-skip-soong-tests
Change-Id: I6f3efaaa3d82505e38a91ee4ba0e18e404360191
Merged-In: If355d24506e3f117d27b21442a6c02bca3402dc7

android/configurable_properties.go

@@ -0,0 +1,28 @@
+package android
+
+import "github.com/google/blueprint/proptools"
+
+// CreateSelectOsToBool is a utility function that makes it easy to create a
+// Configurable property value that maps from os to a bool. Use an empty string
+// to indicate a "default" case.
+func CreateSelectOsToBool(cases map[string]*bool) proptools.Configurable[bool] {
+	var resultCases []proptools.ConfigurableCase[bool]
+	for pattern, value := range cases {
+		if pattern == "" {
+			resultCases = append(resultCases, proptools.NewConfigurableCase(
+				[]proptools.ConfigurablePattern{proptools.NewDefaultConfigurablePattern()},
+				value,
+			))
+		} else {
+			resultCases = append(resultCases, proptools.NewConfigurableCase(
+				[]proptools.ConfigurablePattern{proptools.NewStringConfigurablePattern(pattern)},
+				value,
+			))
+		}
+	}
+
+	return proptools.NewConfigurable(
+		[]proptools.ConfigurableCondition{proptools.NewConfigurableCondition("os", nil)},
+		resultCases,
+	)
+}