Fix usage of __system_property_read_callback for Android<26 #622

Job	Run time
chromium	1m 51s
generate_source	23s
android (armeabi-v7a)	1m 1s
build_and_test (Debug, ubuntu-20.04)	1m 13s
android (arm64-v8a)	1m 1s
reuse	10s
build_and_test (Debug, ubuntu-22.04)	1m 0s
build_and_test (Debug, windows-latest)	2m 38s
windows-arm64	1m 15s
build_and_test (Debug, macos-latest)	46s
build_and_test (Release, ubuntu-20.04)	1m 46s
build_and_test (Release, ubuntu-22.04)	1m 47s
build_and_test (Release, windows-latest)	2m 49s
build_and_test (Release, macos-latest)	59s
	18m 39s

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