Change the log level from error to warning when OTA database is not available to prevent log spam am: 6f7b2430 am: 06884b4d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/15288306

Change-Id: If7f4fc35b3448dfb7d4415499f4094b536c5ef3c