Updated BackendSelector API #18875

Job	Run time
python_test (ubuntu-22.04)	1m 34s
cpp_cmake (macos-14, 1.77)	7m 28s
python_test (macos-14)	1m 32s
build_and_test (ubuntu-22.04, 1.77)	14m 14s
cpp_cmake (windows-2022, nightly)	8m 58s
python_test (windows-2022)	2m 27s
build_and_test (macos-14, stable)	19m 2s
cpp_cmake (ubuntu-22.04, stable)	7m 27s
cpp_test_driver (ubuntu-22.04)	7m 21s
node_test (ubuntu-22.04)	3m 4s
cpp_test_driver (macos-13)	9m 37s
vsce_build_test	6m 12s
node_test (macos-14)	7m 53s
cpp_test_driver (windows-2022)	9m 19s
build_and_test (windows-2022, stable)	22m 51s
node_test (windows-2022)	6m 18s
build_and_test (windows-2022, 1.77)	22m 58s
build_and_test (windows-2022, beta, --exclude ffmpeg --exclude gstreamer-player)	30m 16s
ffi_32bit_build	1m 27s
build_and_test (ubuntu-22.04, nightly)	16m 29s
mcu_esp	2m 52s
mcu (pico-st7789, thumbv6m-none-eabi)	31s
mcu (pico2-st7789, thumbv8m.main-none-eabihf)	40s
android	2m 2s
esp-idf-quick	9m 6s
mcu (stm32h735g, thumbv7em-none-eabihf)	43s
fmt_test	1m 30s
miri	46s
updater_test (0.3.0)	1m 33s
docs / docs	10m 32s
format_lint_typecheck / format_lint_typecheck	3m 3s
tree-sitter / tree-sitter-tests	14s
wasm / wasm	4m 22s
wasm_demo / wasm_demo	2m 38s
cpp_package_test	2m 12s
wasm / build-slintpad	1m 53s
	4h 11m 4s

Provide feedback