Add PrivacyInfo.xcprivacy

[bizz84]

Closes #708.

Since this SDK doesn't collect any user data, is it correct to leave the file empty like this?

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict/>
</plist>

Even though I've added the privacy manifest, I still get this error:

Help anyone?

[hw0102]

If it doesn't collect any data, this should do it.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>NSPrivacyTracking</key>
    <false />
    <key>NSPrivacyTrackingDomains</key>
    <array />
    <key>NSPrivacyCollectedDataTypes</key>
    <array />
    <key>NSPrivacyAccessedAPITypes</key>
    <array />
  </dict>
</plist>