[DO NOT MERGE] Resolver/Chooser - Window inset fixes

Resolver supports numerous layouts, with optional ViewGroups. Need to
make sure the window inset is applied to the correct view. If there is
a List present, add a footer so that the list scrolls underneath the
navbar.

Test: atest ResolverActivityTest
Bug: 145670872
Change-Id: I94652c5e0068436878a307701b5785f02060b8d6

core/java/com/android/internal/app/ChooserActivity.java

@@ -2562,6 +2562,12 @@ public class ChooserActivity extends ResolverActivity {
         }
     }
 
+    @Override
+    protected boolean shouldAddFooterView() {
+        // To accommodate for window insets
+        return true;
+    }
+
     public class ChooserListAdapter extends ResolveListAdapter {
         public static final int TARGET_BAD = -1;
         public static final int TARGET_CALLER = 0;

core/java/com/android/internal/app/ResolverActivity.java

@@ -382,14 +382,30 @@ public class ResolverActivity extends Activity {
         finish();
     }
 
+    /**
+     * Numerous layouts are supported, each with optional ViewGroups.
+     * Make sure the inset gets added to the correct View, using
+     * a footer for Lists so it can properly scroll under the navbar.
+     */
+    protected boolean shouldAddFooterView() {
+        if (useLayoutWithDefault()) return true;
+
+        View buttonBar = findViewById(R.id.button_bar);
+        if (buttonBar == null || buttonBar.getVisibility() == View.GONE) return true;
+
+        return false;
+    }
+
     protected WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {
         mSystemWindowInsets = insets.getSystemWindowInsets();
 
         mResolverDrawerLayout.setPadding(mSystemWindowInsets.left, mSystemWindowInsets.top,
                 mSystemWindowInsets.right, 0);
 
+        resetButtonBar();
+
         // Need extra padding so the list can fully scroll up
-        if (useLayoutWithDefault()) {
+        if (shouldAddFooterView()) {
             if (mFooterSpacer == null) {
                 mFooterSpacer = new Space(getApplicationContext());
             } else {
@@ -407,8 +423,6 @@ public class ResolverActivity extends Activity {
             }
         }
 
-        resetButtonBar();
-
         return insets.consumeSystemWindowInsets();
     }