Address potential Persistent Settings Getters race. #12081

Job	Run time
raspi-2 / initialize	49s
raspi-2-skia / initialize	42s
raspi-2-skia / docker-build-image	1m 29s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	1m 25s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	10m 7s
raspi-2-skia / raspi-2-skia_debug	12m 49s
raspi-2-skia / raspi-2-skia_qa	8m 34s
raspi-2-skia / raspi-2-skia_gold	7m 59s
raspi-2 / raspi_devel	9m 44s
raspi-2 / raspi_debug	12m 37s
raspi-2 / raspi_qa	8m 24s
raspi-2 / raspi_gold	8m 8s
raspi-2 / sbversion-15_devel	9m 43s
raspi-2 / sbversion-15_debug	13m 38s
raspi-2 / sbversion-15_qa	8m 45s
raspi-2 / sbversion-15_gold	8m 19s
raspi-2 / sbversion-16_devel	9m 52s
raspi-2 / sbversion-16_debug	12m 28s
raspi-2 / sbversion-16_qa	8m 19s
raspi-2 / sbversion-16_gold	8m 14s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
	2h 42m 5s

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