添加安装工具类，并增加把kpmmgr安装到/data/adb/ksu/bin的功能，方便模块调用 (#30)

Co-authored-by: liankong <xhsw.new@qq.com>

manager/app/src/main/java/io/sukisu/ultra/UltraToolInstall.java

@@ -0,0 +1,15 @@
+package io.sukisu.ultra;
+
+import static shirkneko.zako.sukisu.ui.util.KsuCliKt.getKpmmgrPath;
+import shirkneko.zako.sukisu.ui.util.KsuCli;
+
+public class UltraToolInstall {
+    private static final String OUTSIDE_KPMMGR_PATH = "/data/adb/ksu/bin/kpmmgr";
+    public static void tryToInstall() {
+        String kpmmgrPath = getKpmmgrPath();
+        if (!UltraShellHelper.isPathExists(OUTSIDE_KPMMGR_PATH)) {
+            UltraShellHelper.CopyFileTo(kpmmgrPath, OUTSIDE_KPMMGR_PATH);
+            UltraShellHelper.runCmd("chmod a+rx " + OUTSIDE_KPMMGR_PATH);
+        }
+    }
+}