Fix no response after Talkback users double-tap on Learn more in Accessibility pages

Root cause: The ag/16569955 to fix unknown items issue when using Switch Access by grouping of related content. The design change impacts AccessibilityFooterPreference#setLinkEnabled that call TextView#setMovementMethod to change components can be focusable to break the grouping relation.

Solution: Reset summary view to nonFocusable after applied TextView#setMovementMethod.

Bug: 221342261
Bug: 221339524
Bug: 223526982
Bug: 215792117
Bug: 215792876
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityFooterPreferenceControllerTest AccessibilityFooterPreferenceTest ToggleFeaturePreferenceFragmentTest
Change-Id: I4a051ea036ded264ee7bf615375177db796f74c7
diff --git a/src/com/android/settings/accessibility/AccessibilityFooterPreference.java b/src/com/android/settings/accessibility/AccessibilityFooterPreference.java
index 67b7827..fd9b6f8 100644
--- a/src/com/android/settings/accessibility/AccessibilityFooterPreference.java
+++ b/src/com/android/settings/accessibility/AccessibilityFooterPreference.java
@@ -25,9 +25,7 @@
 
 import com.android.settingslib.widget.FooterPreference;
 
-/**
- * A custom preference acting as footer of a page. Disables the movement method by default.
- */
+/** A custom preference acting as footer of a page. Disables the movement method by default. */
 public final class AccessibilityFooterPreference extends FooterPreference {
 
     private boolean mLinkEnabled;
@@ -46,12 +44,16 @@
 
         final TextView title = holder.itemView.findViewById(android.R.id.title);
         if (mLinkEnabled) {
-            // When a TextView has a movement method, it will set the view to clickable. This makes
-            // View.onTouchEvent always return true and consumes the touch event, essentially
-            // nullifying any return values of MovementMethod.onTouchEvent.
+            // When a TextView has a movement method, it will set the view to focusable and
+            // clickable. This makes View.onTouchEvent always return true and consumes the touch
+            // event, essentially nullifying any return values of MovementMethod.onTouchEvent.
             // To still allow propagating touch events to the parent when this view doesn't have
             // links, we only set the movement method here if the text contains links.
             title.setMovementMethod(LinkMovementMethod.getInstance());
+
+            // Groups of related title and link content by making the container focusable,
+            // then make all the children inside not focusable.
+            title.setFocusable(false);
         } else {
             title.setMovementMethod(/* movement= */ null);
         }
diff --git a/src/com/android/settings/accessibility/AccessibilityFooterPreferenceController.java b/src/com/android/settings/accessibility/AccessibilityFooterPreferenceController.java
index c22b11e..a422eb8 100644
--- a/src/com/android/settings/accessibility/AccessibilityFooterPreferenceController.java
+++ b/src/com/android/settings/accessibility/AccessibilityFooterPreferenceController.java
@@ -122,5 +122,8 @@
         } else {
             footerPreference.setLinkEnabled(false);
         }
+
+        // Grouping subcomponents to make more accessible.
+        footerPreference.setSelectable(false);
     }
 }
diff --git a/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceControllerTest.java
index cc8520b..cce240d 100644
--- a/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceControllerTest.java
@@ -121,4 +121,16 @@
         assertThat(learnMoreView.getVisibility()).isEqualTo(View.GONE);
         assertThat(mPreference.isLinkEnabled()).isFalse();
     }
+
+    @Test
+    public void onBindViewHolder_setHelpResource_expectSummaryViewIsNonFocusable() {
+        mController.setupHelpLink(R.string.help_url_timeout, TEST_CONTENT_DESCRIPTION);
+        mController.displayPreference(mScreen);
+
+        mPreference.onBindViewHolder(mPreferenceViewHolder);
+
+        final TextView summaryView = (TextView) mPreferenceViewHolder
+                .findViewById(android.R.id.title);
+        assertThat(summaryView.isFocusable()).isFalse();
+    }
 }
diff --git a/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceTest.java b/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceTest.java
index 14c56e8..0f83bc3 100644
--- a/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceTest.java
+++ b/tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceTest.java
@@ -71,4 +71,15 @@
                 android.R.id.title);
         assertThat(summaryView.getMovementMethod()).isInstanceOf(MovementMethod.class);
     }
+
+    @Test
+    public void onBindViewHolder_setLinkEnabled_expectSummaryViewIsNonFocusable() {
+        mAccessibilityFooterPreference.setLinkEnabled(true);
+
+        mAccessibilityFooterPreference.onBindViewHolder(mPreferenceViewHolder);
+
+        final TextView summaryView = (TextView) mPreferenceViewHolder.findViewById(
+                android.R.id.title);
+        assertThat(summaryView.isFocusable()).isFalse();
+    }
 }
diff --git a/tests/robotests/src/com/android/settings/accessibility/ToggleFeaturePreferenceFragmentTest.java b/tests/robotests/src/com/android/settings/accessibility/ToggleFeaturePreferenceFragmentTest.java
index 04018a6..114f969 100644
--- a/tests/robotests/src/com/android/settings/accessibility/ToggleFeaturePreferenceFragmentTest.java
+++ b/tests/robotests/src/com/android/settings/accessibility/ToggleFeaturePreferenceFragmentTest.java
@@ -322,7 +322,7 @@
                 (AccessibilityFooterPreference) mFragment.getPreferenceScreen().getPreference(
                         mFragment.getPreferenceScreen().getPreferenceCount() - 1);
         assertThat(accessibilityFooterPreference.getSummary()).isEqualTo(DEFAULT_SUMMARY);
-        assertThat(accessibilityFooterPreference.isSelectable()).isEqualTo(true);
+        assertThat(accessibilityFooterPreference.isSelectable()).isEqualTo(false);
         assertThat(accessibilityFooterPreference.getOrder()).isEqualTo(Integer.MAX_VALUE - 1);
     }