fix(google-resumable-media): Drop support for Python 3.9 (#16938)

This PR updates `google-resumable-media` to establish Python 3.10 as the
minimum supported version, dropping support for Python 3.9 and below.

### Changes

* Configuration: Updated `setup.py` and `noxfile.py` to require Python
3.10+ and remove references to Python 3.9.
* Documentation: Updated `README.rst` to reflect the new supported and
unsupported Python versions.
* Constraints: Updated `constraints-3.10.txt` with minimum versions from
`constraints-3.9.txt` and deleted `constraints-3.9.txt`.

Fixes internal issue: http://b/482126936 🦕

Author: chalmerlowe

packages/google-resumable-media/README.rst

@@ -16,12 +16,12 @@ support at `google._async_resumable_media`.
 
 Supported Python Versions
 -------------------------
-Python >= 3.9
+Python >= 3.10
 
 Unsupported Python Versions
 ---------------------------
 
-Python <= 3.8
+Python <= 3.9
 
 
 License

packages/google-resumable-media/noxfile.py

@@ -25,7 +25,7 @@
 RUFF_VERSION = "ruff==0.14.14"
 
 DEFAULT_PYTHON_VERSION = "3.14"
-UNIT_TEST_PYTHON_VERSIONS = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+UNIT_TEST_PYTHON_VERSIONS = ["3.10", "3.11", "3.12", "3.13", "3.14"]
 SYSTEM_TEST_PYTHON_VERSIONS = UNIT_TEST_PYTHON_VERSIONS
 
 # Error if a python version is missing

packages/google-resumable-media/setup.py

@@ -51,14 +51,13 @@
     zip_safe=False,
     install_requires=REQUIREMENTS,
     extras_require=EXTRAS_REQUIRE,
-    python_requires='>= 3.9',
+    python_requires='>= 3.10',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',

packages/google-resumable-media/testing/constraints-3.10.txt

@@ -0,0 +1,11 @@
+# This constraints file is used to check that lower bounds
+# are correct in setup.py
+# List *all* library dependencies and extras in this file.
+# Pin the version to the lower bound.
+#
+# e.g., if setup.py has "foo >= 1.14.0, < 2.0.0dev",
+# Then this file should have foo==1.14.0
+crcmod==1.7
+google-crc32c==1.0
+aiohttp==3.6.2
+requests==2.23.0