ohos: Add basic IME and keyboard support (#34188)

* ohos: Add basic IME and keyboard support

- Add extremely basic support for keyboard events
- Add basic IME support
   - Showing and hiding the IME
   - inserting text
   - deleting characters
   - very basic configuration of the IME

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* Apply suggestions from code review

Improve the log message

Co-authored-by: Josh Matthews <josh@joshmatthews.net>
Signed-off-by: Jonathan Schwender <55576758+jschwe@users.noreply.github.com>

* Update ports/servoshell/egl/ohos.rs

Co-authored-by: Mukilan Thiyagarajan <mukilanthiagarajan@gmail.com>
Signed-off-by: Jonathan Schwender <55576758+jschwe@users.noreply.github.com>

* ohos: Bump the minimum required SDK version to 5.0

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* ohos: Remove pub from callbacks

The callbacks don't need to be public, as we will be registering them.

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* Rename composition event

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* ohos: clippy in log

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* ohos: address some clippy warnings

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* ohos: Raise Error in mach if unsupported SDK version is used.

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* Add keyboard-types dependency for android

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

---------

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>
Signed-off-by: Jonathan Schwender <55576758+jschwe@users.noreply.github.com>
Co-authored-by: Josh Matthews <josh@joshmatthews.net>
Co-authored-by: Mukilan Thiyagarajan <mukilanthiagarajan@gmail.com>

python/servo/platform/build_target.py

@@ -275,16 +275,10 @@ class OpenHarmonyTarget(CrossBuildTarget):
                 meta = json.load(meta_file)
             ohos_api_version = int(meta['apiVersion'])
             ohos_sdk_version = parse_version(meta['version'])
-            if ohos_sdk_version < parse_version('4.0'):
-                print("Warning: mach build currently assumes at least the OpenHarmony 4.0 SDK is used.")
+            if ohos_sdk_version < parse_version('5.0') or ohos_api_version < 12:
+                raise RuntimeError("Building servo for OpenHarmony requires SDK version 5.0 (API-12) or newer.")
             print(f"Info: The OpenHarmony SDK {ohos_sdk_version} is targeting API-level {ohos_api_version}")
-            os_type = platform.system().lower()
-            if os_type == "windows" and ohos_sdk_version < parse_version('5.0'):
-                # The OpenHarmony SDK for Windows hosts currently before OH 5.0 did not contain a
-                # libclang shared library, which is required by `bindgen`.
-                raise Exception("Building servo for OpenHarmony on windows requires SDK version 5.0 or newer.")
-
-        except Exception as e:
+        except (OSError, json.JSONDecodeError) as e:
             print(f"Failed to read metadata information from {package_info}")
             print(f"Exception: {e}")