Timeline update: third-party autofill services support on Chrome on Android

<uses-permission android:name="android.permission.READ_USER_DICTIONARY"/>
<queries>
 <!-- To Query Chrome Beta: -->
 <package android:name="com.chrome.beta" />

 <!-- To Query Chrome Stable: -->
 <package android:name="com.android.chrome" />
</queries>

final String CHROME_CHANNEL_PACKAGE = "com.android.chrome";  // Chrome Stable.
final String CONTENT_PROVIDER_NAME = ".AutofillThirdPartyModeContentProvider";
final String THIRD_PARTY_MODE_COLUMN = "autofill_third_party_state";
final String THIRD_PARTY_MODE_ACTIONS_URI_PATH = "autofill_third_party_mode";

final Uri uri = new Uri.Builder()
                  .scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(CHROME_CHANNEL_PACKAGE + CONTENT_PROVIDER_NAME)
                  .path(THIRD_PARTY_MODE_ACTIONS_URI_PATH)
                  .build();

final Cursor cursor = getContentResolver().query(
                  uri,
                  /*projection=*/new String[] {THIRD_PARTY_MODE_COLUMN},
                  /*selection=*/ null,
                  /*selectionArgs=*/ null,
                  /*sortOrder=*/ null);


if (cursor == null) {
  // Terminate now! Older versions of Chromium don't provide this information.
}

cursor.moveToFirst(); // Retrieve the result;

int index = cursor.getColumnIndex(THIRD_PARTY_MODE_COLUMN);

if (0 == cursor.getInt(index)) {
  // 0 means that the third party mode is turned off. Chrome uses its built-in
  // password manager. This is the default for new users.
} else {
  // 1 means that the third party mode is turned on. Chrome uses forwards all
  // autofill requests to Android Autofill. Users have to opt-in for this.
}

Intent autofillSettingsIntent = new Intent(Intent.ACTION_APPLICATION_PREFERENCES);
autofillSettingsIntent.addCategory(Intent.CATEGORY_DEFAULT);
autofillSettingsIntent.addCategory(Intent.CATEGORY_APP_BROWSER);
autofillSettingsIntent.addCategory(Intent.CATEGORY_PREFERENCE);

// Invoking the intent with a chooser allows users to select the channel they want to 
// configure. If only one browser reacts to the intent, the chooser is skipped.
Intent chooser = Intent.createChooser(autofillSettingsIntent, "Pick Chrome Channel");
startActivity(chooser);

// If the caller knows which Chrome channel they want to configure, 
// they can instead add a package hint to the intent, e.g.
autofillSettingsIntent.setPackage("com.android.chrome");
startActivity(autofillSettingsInstent);