Avoid mkdir -m too, to improve backward compat of Android ADB setup

Without this, some older devices (API 22) were failing during automated
setup. That was somewhat hidden by them supporting user certificates,
but still it would be better to use system certificates properly anyway.

Author: pimterry

src/interceptors/android/adb-commands.ts

@@ -316,7 +316,9 @@ export async function injectSystemCertificate(
 
             # Create a separate temp directory, to hold the current certificates
             # Without this, when we add the mount we can't read the current certs anymore.
-            mkdir -p -m 700 /data/local/tmp/htk-ca-copy
+            mkdir -p /data/local/tmp/htk-ca-copy
+            chown 700 /data/local/tmp/htk-ca-copy
+            rm -rf /data/local/tmp/htk-ca-copy/*
 
             # Copy out the existing certificates
             if [ -d "/apex/com.android.conscrypt/cacerts" ]; then