Channel pinning: list indicator and sheet header icons #19653

Job	Run time
Rubocop	18s
Detekt	2m 53s
base-android-ci / Run unit tests	8m 0s
base-android-ci / Run actionlint	16s
base-android-ci / Build	8m 26s
base-android-ci / Run static checks	7m 16s
	27m 9s

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