[cr149][Android] Changes for tab favicon feature

Chromium changes:
https://chromium.googlesource.com/chromium/src/+/5ee2afaf87b258f0f692c32d17866114a996eb66

commit 5ee2afaf87b258f0f692c32d17866114a996eb66
Author: Zhe Li <zheliooo@google.com>
Date:   Mon Apr 20 13:08:32 2026 -0700

    [TabFavicon] Do not fallback to host for tab switcher and tab strip

    - Guarded behind feature flag sFaviconDisableHostFallback.
    - Sets `fallbackToHost = false` in LayerTitleCache.java and TabListFaviconProvider.java when feature is enabled.
    - Default `fallbackToHost = true` for all the other callsites.
    - Added histograms Favicons.AndroidHostFallbackFetchResult.* in favicon_helper.cc

    Bug: 468979189
    Change-Id: I5574adf85647c1d5205889dddc2bc42bfba35305
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7745223
    Reviewed-by: Theresa Wellington <twellington@chromium.org>
    Commit-Queue: Zhe Li <zheliooo@google.com>
    Auto-Submit: Zhe Li <zheliooo@google.com>
    Cr-Commit-Position: refs/heads/main@{#1617726}

android/java/org/chromium/chrome/browser/password_manager/settings/PasswordEntryPreference.java

@@ -54,6 +54,7 @@ public class PasswordEntryPreference extends Preference {
                     mProfile,
                     mOriginUrl,
                     faviconSizePixels,
+                    /* fallbackToHost= */ true,
                     (bitmap, iconUrl) -> {
                         if (bitmap == null) {
                             bitmap =