Fix chips constructor docs for callbacks (#143361)

fixes [ActionChip constructor documentation does not match class documentation](https://github.com/flutter/flutter/issues/137964)

packages/flutter/lib/src/material/action_chip.dart

@@ -81,9 +81,10 @@ enum _ChipVariant { flat, elevated }
 class ActionChip extends StatelessWidget implements ChipAttributes, TappableChipAttributes, DisabledChipAttributes {
   /// Create a chip that acts like a button.
   ///
-  /// The [label], [onPressed], [autofocus], and [clipBehavior] arguments must
-  /// not be null. The [pressElevation] and [elevation] must be null or
-  /// non-negative. Typically, [pressElevation] is greater than [elevation].
+  /// The [label], [autofocus], and [clipBehavior] arguments must not be null.
+  /// When [onPressed] is null, the [ActionChip] will be disabled. The [pressElevation]
+  /// and [elevation] must be null or non-negative. Typically, [pressElevation]
+  /// is greater than [elevation].
   const ActionChip({
     super.key,
     this.avatar,
@@ -114,9 +115,10 @@ class ActionChip extends StatelessWidget implements ChipAttributes, TappableChip
 
   /// Create an elevated chip that acts like a button.
   ///
-  /// The [label], [onPressed], [autofocus], and [clipBehavior] arguments must
-  /// not be null. The [pressElevation] and [elevation] must be null or
-  /// non-negative. Typically, [pressElevation] is greater than [elevation].
+  /// The [label], [autofocus], and [clipBehavior] arguments must not be null.
+  /// When [onPressed] is null, the [ActionChip] will be disabled. The [pressElevation]
+  /// and [elevation] must be null or non-negative. Typically, [pressElevation]
+  /// is greater than [elevation].
   const ActionChip.elevated({
     super.key,
     this.avatar,

packages/flutter/lib/src/material/choice_chip.dart

@@ -59,8 +59,9 @@ class ChoiceChip extends StatelessWidget
   /// Create a chip that acts like a radio button.
   ///
   /// The [label], [selected], [autofocus], and [clipBehavior] arguments must
-  /// not be null. The [pressElevation] and [elevation] must be null or
-  /// non-negative. Typically, [pressElevation] is greater than [elevation].
+  /// not be null. When [onSelected] is null, the [ChoiceChip] will be disabled.
+  /// The [pressElevation] and [elevation] must be null or non-negative. Typically,
+  /// [pressElevation] is greater than [elevation].
   const ChoiceChip({
     super.key,
     this.avatar,
@@ -98,8 +99,9 @@ class ChoiceChip extends StatelessWidget
   /// Create an elevated chip that acts like a radio button.
   ///
   /// The [label], [selected], [autofocus], and [clipBehavior] arguments must
-  /// not be null. The [pressElevation] and [elevation] must be null or
-  /// non-negative. Typically, [pressElevation] is greater than [elevation].
+  /// not be null. When [onSelected] is null, the [ChoiceChip] will be disabled.
+  /// The [pressElevation] and [elevation] must be null or non-negative. Typically,
+  /// [pressElevation] is greater than [elevation].
   const ChoiceChip.elevated({
     super.key,
     this.avatar,

packages/flutter/lib/src/material/filter_chip.dart

@@ -64,8 +64,9 @@ class FilterChip extends StatelessWidget
   /// Create a chip that acts like a checkbox.
   ///
   /// The [selected], [label], [autofocus], and [clipBehavior] arguments must
-  /// not be null. The [pressElevation] and [elevation] must be null or
-  /// non-negative. Typically, [pressElevation] is greater than [elevation].
+  /// not be null. When [onSelected] is null, the [FilterChip] will be disabled.
+  /// The [pressElevation] and [elevation] must be null or non-negative. Typically,
+  /// [pressElevation] is greater than [elevation].
   const FilterChip({
     super.key,
     this.avatar,
@@ -107,8 +108,9 @@ class FilterChip extends StatelessWidget
   /// Create an elevated chip that acts like a checkbox.
   ///
   /// The [selected], [label], [autofocus], and [clipBehavior] arguments must
-  /// not be null. The [pressElevation] and [elevation] must be null or
-  /// non-negative. Typically, [pressElevation] is greater than [elevation].
+  /// not be null. When [onSelected] is null, the [FilterChip] will be disabled.
+  /// The [pressElevation] and [elevation] must be null or non-negative. Typically,
+  /// [pressElevation] is greater than [elevation].
   const FilterChip.elevated({
     super.key,
     this.avatar,

packages/flutter/lib/src/material/input_chip.dart

@@ -81,7 +81,8 @@ class InputChip extends StatelessWidget
   /// Creates an [InputChip].
   ///
   /// The [onPressed] and [onSelected] callbacks must not both be specified at
-  /// the same time.
+  /// the same time. When both [onPressed] and [onSelected] are null, the chip
+  /// will be disabled.
   ///
   /// The [pressElevation] and [elevation] must be null or non-negative.
   /// Typically, [pressElevation] is greater than [elevation].