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>

libraries/voiceplayer/api/build.gradle.kts

@@ -14,8 +14,6 @@ android {
 }
 
 dependencies {
-    implementation(libs.androidx.annotationjvm)
-    implementation(libs.coroutines.core)
     implementation(projects.libraries.architecture)
     implementation(projects.libraries.matrix.api)
 }

libraries/voiceplayer/impl/build.gradle.kts

@@ -22,7 +22,6 @@ dependencies {
     api(projects.libraries.voiceplayer.api)
 
     implementation(projects.libraries.architecture)
-    implementation(projects.libraries.audio.api)
     implementation(projects.libraries.core)
     implementation(projects.libraries.di)
     implementation(projects.libraries.matrix.api)
@@ -31,7 +30,6 @@ dependencies {
     implementation(projects.libraries.uiUtils)
     implementation(projects.services.analytics.api)
 
-    implementation(libs.androidx.annotationjvm)
     implementation(libs.androidx.datastore.preferences)
     implementation(libs.coroutines.core)