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>

Cargo.lock

@@ -5089,6 +5089,22 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "ohos-ime"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48107e68ed8451c17c2ff95938e1ba86003fb290a04f7a0213ce2d16ce4b3ee6"
+dependencies = [
+ "log",
+ "ohos-ime-sys",
+]
+
+[[package]]
+name = "ohos-ime-sys"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12be156a401d3a97d3b2e5de3a864f585a71098bbc830130a5c876c6ba38f572"
+
 [[package]]
 name = "ohos-sys"
 version = "0.4.0"
@@ -6608,6 +6624,8 @@ dependencies = [
  "net",
  "net_traits",
  "nix",
+ "ohos-ime",
+ "ohos-ime-sys",
  "ohos-sys",
  "ohos-vsync",
  "raw-window-handle",
@@ -6628,6 +6646,7 @@ dependencies = [
  "windows-sys 0.59.0",
  "winit",
  "winres",
+ "xcomponent-sys",
 ]
 
 [[package]]
@@ -8855,6 +8874,9 @@ name = "xcomponent-sys"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "663e26cce4f574daf506a01f4e5cfedd5355c60afebc30daeeeea95f38f6b600"
+dependencies = [
+ "keyboard-types",
+]
 
 [[package]]
 name = "xcursor"