Remove unused Gradle dependencies

Remove dependencies flagged as unused by the Dependency Analysis Gradle Plugin
(`./gradlew buildHealth`) and explicitly declared in module build files.

Removals were skipped when the dependency provides transitively something the
module (or a consumer of an `api` dependency) uses directly, as well as for
runtime-only dependencies (element-call-embedded, sentry-android,
rustls-platform-verifier). Dependencies added by the convention plugin helpers
(composeDependencies, testCommonDependencies) are left untouched.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

features/lockscreen/impl/build.gradle.kts

@@ -31,13 +31,10 @@ dependencies {
     implementation(projects.libraries.core)
     implementation(projects.libraries.androidutils)
     implementation(projects.libraries.architecture)
-    implementation(projects.libraries.matrix.api)
-    implementation(projects.libraries.matrixui)
     implementation(projects.libraries.designsystem)
     implementation(projects.libraries.featureflag.api)
     implementation(projects.libraries.cryptography.api)
     implementation(projects.libraries.preferences.api)
-    implementation(projects.libraries.testtags)
     implementation(projects.libraries.uiUtils)
     implementation(projects.features.logout.api)
     implementation(projects.libraries.uiCommon)
@@ -52,7 +49,6 @@ dependencies {
     testImplementation(projects.libraries.matrix.test)
     testImplementation(projects.libraries.cryptography.test)
     testImplementation(projects.libraries.cryptography.impl)
-    testImplementation(projects.libraries.featureflag.test)
     testImplementation(projects.libraries.sessionStorage.test)
     testImplementation(projects.services.appnavstate.test)
     testImplementation(projects.features.logout.test)