[Autofill Assistant] Expand bottom sheet when same tab is selected.

Previously, we did run the |safeNativeSetVisible(true)| which does not
show the content or expand the bottom sheet while in the |RUNNING|
state. This CL forces an expand of the bottom sheet in that scenario.

Bug: b/152951618
Change-Id: I9702f825f8ee29e90814c3b15524d0181dc6f821
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132367Reviewed-by: Clemens Arbesser <arbesser@google.com>
Commit-Queue: Sandro Maggi <sandromaggi@google.com>
Cr-Commit-Position: refs/heads/master@{#755360}

chrome/android/features/autofill_assistant/java/src/org/chromium/chrome/browser/autofill_assistant/AutofillAssistantUiController.java

@@ -137,8 +137,10 @@ class AutofillAssistantUiController {
                             // later.
                             safeNativeSetVisible(false);
                         } else if (tab.getWebContents() == mWebContents) {
-                            // The original tab was re-selected. Show it again
+                            // The original tab was re-selected. Show it again and force an
+                            // expansion on the bottom sheet.
                             safeNativeSetVisible(true);
+                            showContentAndExpandBottomSheet();
                         } else {
                             // A new tab was selected. If Autofill Assistant is running on it,
                             // attach the UI to that other instance, otherwise destroy the UI.