Add `reserved_account_keys` module to sdk #243

Job	Run time
android (ubuntu-20.04, x86_64-linux-android)	2m 48s
ios (macos-11, aarch64-apple-ios)	6m 5s
android (ubuntu-20.04, aarch64-linux-android)	3m 2s
ios (macos-11, x86_64-apple-ios)	6m 24s
android (ubuntu-20.04, i686-linux-android)	3m 2s
ios (macos-11, aarch64-apple-darwin)	6m 23s
android (ubuntu-20.04, armv7-linux-androideabi)	3m 17s
ios (macos-11, x86_64-apple-darwin)	6m 18s
error_reporting	0s
	37m 19s

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