Add libenv_filter Rust crate to allowed_deps.txt

Dependency of android_logger that replaced env_filter.

Apex-Size-Increase: 100KB
Previous-Platform-Support: No dependencies on Android APIs.
Aosp-First: yes
Test-Info: tested through android_logger ATest tests

Bug: 390554805
Bug: 390555176
Bug: 359442427
Test: atest external/rust/android-crates-io/crates/android_logger \
Test:       system/logging/rust
Test: on the entire CL chain
Change-Id: I64e8ef9605e001fe2e845e406d42874a4d525361
diff --git a/build/allowed_deps.txt b/build/allowed_deps.txt
index fe1977c..b60759b 100644
--- a/build/allowed_deps.txt
+++ b/build/allowed_deps.txt
@@ -603,6 +603,7 @@
 libeigen(minSdkVersion:(no version))
 libeigen(minSdkVersion:apex_inherit)
 libelf(minSdkVersion:apex_inherit)
+libenv_filter(minSdkVersion:29)
 libenv_logger(minSdkVersion:29)
 liberrno(minSdkVersion:30)
 liberror_headers(minSdkVersion:29)