ToolsInstaller: update Magisk directory

/data/adb/modules has been the location for modules since v18.0 and nobody
should reasonably be on any older version anymore. This has continued to
work for this long because Magisk created symlinks for backwards compat. However,
these symlinks are not created anymore on Android 11, which is where this
problem	first surfaced.

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

tunnel/src/main/java/com/wireguard/android/util/ToolsInstaller.java

@@ -143,12 +143,12 @@ public final class ToolsInstaller {
         extract();
         final StringBuilder script = new StringBuilder("set -ex; ");
 
-        script.append("trap 'rm -rf /sbin/.magisk/img/wireguard' INT TERM EXIT; ");
-        script.append(String.format("rm -rf /sbin/.magisk/img/wireguard/; mkdir -p /sbin/.magisk/img/wireguard%s; ", INSTALL_DIR));
-        script.append("printf 'name=WireGuard Command Line Tools\nversion=1.0\nversionCode=1\nauthor=zx2c4\ndescription=Command line tools for WireGuard\nminMagisk=1500\n' > /sbin/.magisk/img/wireguard/module.prop; ");
-        script.append("touch /sbin/.magisk/img/wireguard/auto_mount; ");
+        script.append("trap 'rm -rf /data/adb/moduleswireguard' INT TERM EXIT; ");
+        script.append(String.format("rm -rf /data/adb/modules/wireguard/; mkdir -p /data/adb/modules/wireguard%s; ", INSTALL_DIR));
+        script.append("printf 'name=WireGuard Command Line Tools\nversion=1.0\nversionCode=1\nauthor=zx2c4\ndescription=Command line tools for WireGuard\nminMagisk=1500\n' > /data/adb/modules/wireguard/module.prop; ");
+        script.append("touch /data/adb/modules/wireguard/auto_mount; ");
         for (final String name : EXECUTABLES) {
-            final File destination = new File("/sbin/.magisk/img/wireguard" + INSTALL_DIR, name);
+            final File destination = new File("/data/adb/modules/wireguard" + INSTALL_DIR, name);
             script.append(String.format("cp '%s' '%s'; chmod 755 '%s'; chcon 'u:object_r:system_file:s0' '%s' || true; ",
                     new File(localBinaryDir, name), destination, destination, destination));
         }
@@ -191,7 +191,7 @@ public final class ToolsInstaller {
         synchronized (lock) {
             if (installAsMagiskModule == null) {
                 try {
-                    installAsMagiskModule = rootShell.run(null, "[ -d /sbin/.magisk/mirror -a -d /sbin/.magisk/img -a ! -f /cache/.disable_magisk ]") == OsConstants.EXIT_SUCCESS;
+                    installAsMagiskModule = rootShell.run(null, "[ -d /data/adb/modules -a ! -f /cache/.disable_magisk ]") == OsConstants.EXIT_SUCCESS;
                 } catch (final Exception ignored) {
                     installAsMagiskModule = false;
                 }