refactor(multiple): simplify ngSkipHydration expressions (#27093)

We don't need to specify a value for `ngSkipHydration`.

(cherry picked from commit fedff53)

Author: crisbeto

src/cdk/table/table.ts

@@ -205,7 +205,7 @@ export interface RenderRow<T> {
   host: {
     'class': 'cdk-table',
     '[class.cdk-table-fixed-layout]': 'fixedLayout',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   encapsulation: ViewEncapsulation.None,
   // The "OnPush" status for the `MatTable` component is effectively a noop, so we are removing it.

src/material/autocomplete/autocomplete.ts

@@ -338,7 +338,7 @@ export abstract class _MatAutocompleteBase
   inputs: ['disableRipple'],
   host: {
     'class': 'mat-mdc-autocomplete',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   providers: [{provide: MAT_OPTION_PARENT_COMPONENT, useExisting: MatAutocomplete}],
   animations: [panelAnimation],

src/material/chips/chip-listbox.ts

@@ -75,7 +75,7 @@ export const MAT_CHIP_LISTBOX_CONTROL_VALUE_ACCESSOR: any = {
     '[attr.aria-disabled]': 'disabled.toString()',
     '[attr.aria-multiselectable]': 'multiple',
     '[attr.aria-orientation]': 'ariaOrientation',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
     '[class.mat-mdc-chip-list-disabled]': 'disabled',
     '[class.mat-mdc-chip-list-required]': 'required',
     '(focus)': 'focus()',

src/material/legacy-autocomplete/autocomplete.ts

@@ -35,7 +35,7 @@ import {_MatAutocompleteBase} from '@angular/material/autocomplete';
   inputs: ['disableRipple'],
   host: {
     'class': 'mat-autocomplete',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   providers: [{provide: MAT_LEGACY_OPTION_PARENT_COMPONENT, useExisting: MatLegacyAutocomplete}],
 })

src/material/legacy-chips/chip-list.ts

@@ -109,7 +109,7 @@ export class MatLegacyChipListChange {
     '(blur)': '_blur()',
     '(keydown)': '_keydown($event)',
     '[id]': '_uid',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   providers: [{provide: MatLegacyFormFieldControl, useExisting: MatLegacyChipList}],
   styleUrls: ['chips.css'],

src/material/legacy-form-field/form-field.ts

@@ -153,7 +153,7 @@ export const MAT_LEGACY_FORM_FIELD_DEFAULT_OPTIONS =
     '[class.ng-invalid]': '_shouldForward("invalid")',
     '[class.ng-pending]': '_shouldForward("pending")',
     '[class._mat-animation-noopable]': '!_animationsEnabled',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   inputs: ['color'],
   encapsulation: ViewEncapsulation.None,

src/material/legacy-menu/menu.ts

@@ -39,7 +39,7 @@ import {
     '[attr.aria-label]': 'null',
     '[attr.aria-labelledby]': 'null',
     '[attr.aria-describedby]': 'null',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   animations: [matMenuAnimations.transformMenu, matMenuAnimations.fadeInItems],
   providers: [{provide: MAT_MENU_PANEL, useExisting: MatLegacyMenu}],

src/material/legacy-select/select.ts

@@ -149,7 +149,7 @@ export class MatLegacySelectTrigger {}
     '(keydown)': '_handleKeydown($event)',
     '(focus)': '_onFocus()',
     '(blur)': '_onBlur()',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   animations: [
     matLegacySelectAnimations.transformPanelWrap,

src/material/legacy-table/table.ts

@@ -46,7 +46,7 @@ export class MatLegacyRecycleRows {}
   host: {
     'class': 'mat-table',
     '[class.mat-table-fixed-layout]': 'fixedLayout',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
   providers: [
     // TODO(michaeljamesparsons) Abstract the view repeater strategy to a directive API so this code

src/material/legacy-tabs/tab-group.ts

@@ -54,7 +54,7 @@ import {
     'class': 'mat-tab-group',
     '[class.mat-tab-group-dynamic-height]': 'dynamicHeight',
     '[class.mat-tab-group-inverted-header]': 'headerPosition === "below"',
-    'ngSkipHydration': 'true',
+    'ngSkipHydration': '',
   },
 })
 export class MatLegacyTabGroup extends _MatTabGroupBase {