Change the log level from error to warning when OTA database is not available to prevent log spam am: 6f7b2430 am: a2f263f2 am: b6bcbd65

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

Change-Id: Ie463b3b4ca069f9593679a6801ab324ff3a1a22f