docs: Document suported BiDi events (#826)

Author: mykola-mokhnach

README.md

@@ -243,6 +243,11 @@ xpath | For elements lookup Xpath strategy the driver uses the same XML tree tha
 > using them or plan to use them in the future.
 
 
+# BiDi Protocol Support
+
+UIAutomator2 driver has partial support of the [BiDi Protocol](https://w3c.github.io/webdriver-bidi/) since version 3.7.10. Check the [Supported BiDi Commands And Events](./docs/bidi.md) document for more details.
+
+
 ## Parallel Tests
 
 It is possible to execute tests in parallel using UiAutomator2 driver.

docs/bidi.md

@@ -0,0 +1,22 @@
+# Supported BiDi Commands And Events
+
+Only events and commands mentioned below are supported.
+All other entities described in the spec throw not implemented errors.
+
+# Supported Events
+
+## log.entryAdded
+
+This event is emitted if the driver retrieves a new entry for any of the below log types.
+
+### syslog
+
+Events are emitted for both emulator and real devices. Each event contains a single device logcat line.
+Events are always emitted with the `NATIVE_APP` context.
+These events might be disabled if the `appium:skipLogcatCapture` capability is enabled.
+
+### server
+
+Events are emitted for both emulator and real devices. Each event contains a single Appium server log line.
+Events are always emitted with the `NATIVE_APP` context.
+Events are only emitted if the `get_server_logs` server security feature is enabled.