controls: Add boolean constructors for ControlInfo

It would be convenient to be able to iterate over available boolean
values, for example for controls that designate if some function can be
enabled/disabled. The current min/max/def constructor is insufficient,
as .values() is empty, so the values cannot be easily iterated over, and
creating a Span of booleans does not work for the values constructor.

Add new constructors to ControlInfo that takes a set of booleans (if
both booleans are valid values) plus a default, and another that takes
only one boolean (if only one boolean is a valid value).

Update the ControlInfo test accordingly.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

test/controls/control_info.cpp

@@ -44,6 +44,39 @@ protected:
 			return TestFail;
 		}
 
+		/*
+		 * Test information retrieval from a control with boolean
+		 * values.
+		 */
+		ControlInfo aeEnable({ false, true }, false);
+
+		if (aeEnable.min().get<bool>() != false ||
+		    aeEnable.def().get<bool>() != false ||
+		    aeEnable.max().get<bool>() != true) {
+			cout << "Invalid control range for AeEnable" << endl;
+			return TestFail;
+		}
+
+		if (aeEnable.values()[0].get<bool>() != false ||
+		    aeEnable.values()[1].get<bool>() != true) {
+			cout << "Invalid control values for AeEnable" << endl;
+			return TestFail;
+		}
+
+		ControlInfo awbEnable(true);
+
+		if (awbEnable.min().get<bool>() != true ||
+		    awbEnable.def().get<bool>() != true ||
+		    awbEnable.max().get<bool>() != true) {
+			cout << "Invalid control range for AwbEnable" << endl;
+			return TestFail;
+		}
+
+		if (awbEnable.values()[0].get<bool>() != true) {
+			cout << "Invalid control values for AwbEnable" << endl;
+			return TestFail;
+		}
+
 		return TestPass;
 	}
 };