Add two missing readmes.

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

Author: jschwe

components/deviceinfo/README.md

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+## DeviceInfo native bindings for OpenHarmony
+
+Raw bindings to native DeviceInfo APIs on OpenHarmony.
+
+C API reference: https://gitcode.com/openharmony/docs/blob/master/en/application-dev/reference/apis-basic-services-kit/capi-deviceinfo.md
+
+## Development
+
+This crate is developed as part of the [ohos-sys](https://github.com/openharmony-rs/ohos-sys) bindings.
+
+## License
+
+This crate is licensed under the Apache-2.0 license, matching the OpenHarmony OS SDK.

components/drawing/README.md

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+## Drawing native bindings for OpenHarmony
+
+Raw bindings to the native drawing APIs on OpenHarmony.
+
+C API reference: https://gitcode.com/openharmony/docs/blob/master/en/application-dev/reference/apis-arkgraphics2d/capi-drawing.md
+
+## Development
+
+This crate is developed as part of the [ohos-sys](https://github.com/openharmony-rs/ohos-sys) bindings.
+
+## License
+
+This crate is licensed under the Apache-2.0 license, matching the OpenHarmony OS SDK.