Update Flutter 3.44.4

[JSUYA]

flutter-tizen/flutter-tizen#783

[JSUYA]

This is the same PR as #38.
I have reset 3.44.4 branch. This PR needs to be rebase merged.

[gemini-code-assist]

Code Review

This pull request introduces Tizen cross-compilation support, sysroot generation scripts, and Vulkan external texture support in the embedder, alongside refactoring the pipeline compilation queues for GLES and Vulkan backends. Feedback on these changes includes addressing potential null pointer dereferences in the Vulkan external texture resolution and source initialization, safely escaping shell commands using shlex.quote in the sysroot generator script, and adding a timeout to urllib.request.urlopen to prevent hanging.

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[gemini-code-assist]

In EmbedderExternalTextureGL::ResolveTexture, a check was added to ensure context is not null before calling ResolveTextureSkia. However, this check is missing in the Vulkan counterpart EmbedderExternalTextureVulkan::ResolveTexture. If both aiks_context and context are null, calling ResolveTextureSkia will result in a null pointer dereference and crash.

Please update the method to check context before resolving, matching the GL implementation.

  if (!!aiks_context) {
    return ResolveTextureImpeller(texture_id, aiks_context, size);
  } else if (!!context) {
    return ResolveTextureSkia(texture_id, context, size);
  } else {
    return nullptr;
  }

[gemini-code-assist]

If p_context is null, dereferencing it with *p_context on line 40 will cause a null pointer dereference and crash.

Please add a null check for p_context and return early if it is null, consistent with the check for embedder_desc->image.

  if (!embedder_desc->image) {
    VALIDATION_LOG << "Vulkan image handle is null";
    return;
  }
  if (!p_context) {
    VALIDATION_LOG << "Impeller context is null";
    return;
  }
  const auto& context = impeller::ContextVK::Cast(*p_context);

[gemini-code-assist]

Import the shlex module to safely escape shell commands when extracting RPM packages.

Suggested change

	import argparse
	import os
	import re
	import shutil
	import subprocess
	import sys
	import urllib.parse
	import urllib.request
	from pathlib import Path
	import argparse
	import os
	import re
	import shlex
	import shutil
	import subprocess
	import sys
	import urllib.parse
	import urllib.request
	from pathlib import Path

[gemini-code-assist]

The rpm path is interpolated directly into the shell command string. If the path contains spaces or shell metacharacters, this can lead to command execution failures or shell injection vulnerabilities.

Use shlex.quote to safely escape the path before formatting it into the command.

Suggested change

	for rpm in [f for f in download_path.iterdir() if f.suffix == '.rpm']:
	command = 'rpm2cpio {} | cpio -idum --quiet'.format(rpm)
	subprocess.run(command, shell=True, cwd=sysroot, check=True)
	for rpm in [f for f in download_path.iterdir() if f.suffix == '.rpm']:
	command = 'rpm2cpio {} | cpio -idum --quiet'.format(shlex.quote(str(rpm)))
	subprocess.run(command, shell=True, cwd=sysroot, check=True)

[gemini-code-assist]

Calling urllib.request.urlopen without a timeout can cause the script to hang indefinitely if the network connection is slow or unresponsive.

Please specify a reasonable timeout (e.g., 60 seconds).

Suggested change

	request = urllib.request.Request(url)
	with urllib.request.urlopen(request) as response:
	request = urllib.request.Request(url)
	with urllib.request.urlopen(request, timeout=60) as response: