voice: replace Whisper with sherpa-onnx, live words from Kroko and the final words from Parakeet

Models download in Settings instead of shipping in the APK. Credits for the engine and models are in About.

gearslip/src/main/java/com/k2fsa/sherpa/onnx/FeatureConfig.kt

@@ -0,0 +1,12 @@
+// From sherpa-onnx v1.13.8 (Apache-2.0, https://github.com/k2-fsa/sherpa-onnx), kotlin-api.
+package com.k2fsa.sherpa.onnx
+
+data class FeatureConfig(
+    var sampleRate: Int = 16000,
+    var featureDim: Int = 80,
+    var dither: Float = 0.0f
+)
+
+fun getFeatureConfig(sampleRate: Int, featureDim: Int): FeatureConfig {
+    return FeatureConfig(sampleRate = sampleRate, featureDim = featureDim)
+}