fix(input): don't allow focus when disabled is set (#10214)

Adds the disabled attribute to the parent input/textarea, also fixes
where disabled textareas were focusable regardless of where disabled
was set

fixes #10155

Author: brandyscarney

src/components/input/input.scss

@@ -94,7 +94,7 @@ input.text-input:-webkit-autofill {
   height: 100%;
 }
 
-ion-input[disabled] .input-cover {
+.input[disabled] .input-cover {
   pointer-events: none;
 }
 

src/components/input/input.ts

@@ -216,7 +216,7 @@ export class TextInput extends Ion implements IonicFormInput {
    */
   @Input()
   get disabled() {
-    return this.ngControl ? this.ngControl.disabled : this._disabled;
+    return this._disabled;
   }
   set disabled(val: boolean) {
     this.setDisabled(this._disabled = isTrueProperty(val));
@@ -226,10 +226,18 @@ export class TextInput extends Ion implements IonicFormInput {
    * @private
    */
   setDisabled(val: boolean) {
+    this._renderer.setElementAttribute(this._elementRef.nativeElement, 'disabled', val ? '' : null);
     this._item && this._item.setElementClass('item-input-disabled', val);
     this._native && this._native.isDisabled(val);
   }
 
+  /**
+   * @private
+   */
+  setDisabledState(isDisabled: boolean) {
+    this.disabled = isDisabled;
+  }
+
   /**
    * @input {boolean} If the input should be readonly or not
    */