title: Android Studio 2.1.2 and Android 6: Error while installing restart patches
body: <p>Since updating to Android 6, I get </p>
  
  <p>"Error installing cold swap patches: com.android.tools.fd.client.InstantRunPushFailedException: Error creating folder with: run-as swiss.seabird.seabirdapp1 mkdir -p /data/data/swiss.seabird.seabirdapp1/files/instant-run/dex
  Error while Installing restart patches" </p>
  
  <p>every time I try to run my app, unless it was previously uninstalled or I do a completely new build.</p>
  
  <p>I tried: a) setting write permissions for the app on my mobile device  b) updating the SDK with all tools etc for APK 23. c) unklicking "Restart activity on code changes" in Android Settings, as recommended in another thread on stackoverflow d) specifically selecting this app for debugging in developer settings on my mobile device. None of this worked.</p>
  
  <p>I'm running Android Studio 2.1.2 on Windows 10, and installing the app on a Samsung S5. Previously, with Android 5.1, this problem didn't exist.</p>
  
  <p>Would appreciate any help - thanks in advance!</p>