Remove old download progress update system

app/src/main/java/com/topjohnwu/magisk/utils/ProgressInputStream.kt

@@ -0,0 +1,44 @@
+package com.topjohnwu.magisk.utils
+
+import com.topjohnwu.superuser.internal.UiThreadHandler
+import java.io.FilterInputStream
+import java.io.InputStream
+
+class ProgressInputStream(
+    base: InputStream,
+    val progressEmitter: (Long) -> Unit = {}
+) : FilterInputStream(base) {
+
+    private var bytesRead = 0L
+    private var lastUpdate = 0L
+
+    private fun emitProgress() {
+        val cur = System.currentTimeMillis()
+        if (cur - lastUpdate > 1000) {
+            lastUpdate = cur
+            UiThreadHandler.run { progressEmitter(bytesRead) }
+        }
+    }
+
+    override fun read(): Int {
+        val b = read()
+        if (b >= 0) {
+            bytesRead++
+            emitProgress()
+        }
+        return b
+    }
+
+    override fun read(b: ByteArray): Int {
+        return read(b, 0, b.size)
+    }
+
+    override fun read(b: ByteArray, off: Int, len: Int): Int {
+        val sz = super.read(b, off, len)
+        if (sz > 0) {
+            bytesRead += sz
+            emitProgress()
+        }
+        return sz
+    }
+}