[SEC] Introduce Finch feature and about flag for Search Engine Choice feature

BUG=1002271
[email protected]

Change-Id: I4af1aeb2828c863643a614f0a72a0b2c66436682
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1815357
Commit-Queue: Pavel Yatsuk <[email protected]>
Reviewed-by: Brandon Wylie <[email protected]>
Cr-Commit-Position: refs/heads/master@{#698339}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 870c354..7e71c2b 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -4567,6 +4567,13 @@
                                     kBackForwardCacheVariations,
                                     "BackForwardCache")},
 
+#if defined(OS_ANDROID)
+    {"android-setup-search-engine",
+     flag_descriptions::kAndroidSetupSearchEngineName,
+     flag_descriptions::kAndroidSetupSearchEngineDescription, kOsAndroid,
+     FEATURE_VALUE_TYPE(chrome::android::kAndroidSetupSearchEngine)},
+#endif  // defined(OS_ANDROID)
+
     // NOTE: Adding a new flag requires adding a corresponding entry to enum
     // "LoginCustomFlags" in tools/metrics/histograms/enums.xml. See "Flag
     // Histograms" in tools/metrics/histograms/README.md (run the