Lower default minimum log level from INFO to FINE (#1827)

* Increase logging level

* Adjust log levels for visibility in non-verbose logs

- Change log level from FINER to FINE in StreamingFileDescriptor
- Update log level from FINER to FINE in AccountSettingsMigration8
- Add note about log levels in LogManager documentation

* Fix KDoc typo

* Update comment

app/src/main/kotlin/at/bitfire/davdroid/log/LogManager.kt

@@ -39,6 +39,10 @@ import javax.inject.Singleton
  *
  * When using the global logger, the class name of the logging calls will still be logged, so there's
  * no need to always get a separate logger for each class (only if the class wants to customize it).
+ *
+ * Note about choosing log levels: records with [Level.FINE] or higher will always be printed to adb logs
+ * (regardless of whether verbose logging is active). Records with a lower level will only be
+ * printed to adb logs when verbose logging is active.
  */
 @Singleton
 class LogManager @Inject constructor(
@@ -79,7 +83,10 @@ class LogManager @Inject constructor(
 
         // root logger: set default log level and always log to logcat
         val rootLogger = Logger.getLogger("")
-        rootLogger.level = if (logVerbose) Level.ALL else Level.INFO
+        rootLogger.level = if (logVerbose)
+            Level.ALL       // include everything (including HTTP interceptor logs) in verbose logs
+        else
+            Level.FINE      // include detailed information like content provider operations in non-verbose logs
         rootLogger.addHandler(LogcatHandler(BuildConfig.APPLICATION_ID))
 
         // log to file, if requested

app/src/main/kotlin/at/bitfire/davdroid/settings/migration/AccountSettingsMigration8.kt

@@ -18,7 +18,6 @@ import dagger.hilt.components.SingletonComponent
 import dagger.multibindings.IntKey
 import dagger.multibindings.IntoMap
 import org.dmfs.tasks.contract.TaskContract
-import org.dmfs.tasks.contract.TaskContract.CommonSyncColumns
 import java.util.logging.Level
 import java.util.logging.Logger
 import javax.inject.Inject
@@ -50,7 +49,7 @@ class AccountSettingsMigration8 @Inject constructor(
                         TaskContract.Tasks.SYNC1 to null,
                         TaskContract.Tasks.SYNC2 to null
                     )
-                    logger.log(Level.FINER, "Updating task $id", values)
+                    logger.log(Level.FINE, "Updating task $id", values)
                     provider.client.update(
                         ContentUris.withAppendedId(provider.tasksUri(), id).asSyncAdapter(account),
                         values, null, null)

app/src/main/kotlin/at/bitfire/davdroid/sync/adapter/SyncFrameworkIntegration.kt

@@ -8,7 +8,6 @@ import android.accounts.Account
 import android.content.ContentResolver
 import android.content.Context
 import android.content.SyncRequest
-import android.os.Build
 import android.os.Bundle
 import androidx.annotation.WorkerThread
 import at.bitfire.davdroid.resource.LocalAddressBookStore

app/src/main/kotlin/at/bitfire/davdroid/webdav/StreamingFileDescriptor.kt

@@ -97,7 +97,7 @@ class StreamingFileDescriptor @AssistedInject constructor(
                         body.byteStream().use { source ->
                             transferred += source.copyTo(destination)
                         }
-                        logger.finer("Downloaded $transferred byte(s) from $url")
+                        logger.fine("Downloaded $transferred byte(s) from $url")
                     }
 
                 } else
@@ -118,7 +118,7 @@ class StreamingFileDescriptor @AssistedInject constructor(
             override fun writeTo(sink: BufferedSink) {
                 ParcelFileDescriptor.AutoCloseInputStream(readFd).use { input ->
                     transferred += input.copyTo(sink.outputStream())
-                    logger.finer("Uploaded $transferred byte(s) to $url")
+                    logger.fine("Uploaded $transferred byte(s) to $url")
                 }
             }
         }