Move timing measurements down to FINE log level.

...rc/main/java/org/briarproject/bramble/PoliteExecutor.java

...in/java/org/briarproject/bramble/TimeLoggingExecutor.java

.../org/briarproject/bramble/crypto/CryptoComponentImpl.java

.../main/java/org/briarproject/bramble/crypto/ScryptKdf.java

...n/java/org/briarproject/bramble/crypto/Sec1KeyParser.java

.../briarproject/bramble/lifecycle/LifecycleManagerImpl.java

...va/org/briarproject/bramble/plugin/PluginManagerImpl.java

.../org/briarproject/briar/android/BriarApplicationImpl.java

...g/briarproject/briar/android/blog/BaseControllerImpl.java

...g/briarproject/briar/android/blog/BlogControllerImpl.java

...g/briarproject/briar/android/blog/FeedControllerImpl.java

...iarproject/briar/android/contact/ContactListFragment.java

...arproject/briar/android/contact/ConversationActivity.java

...briarproject/briar/android/forum/CreateForumActivity.java

...g/briarproject/briar/android/forum/ForumListFragment.java

...arproject/briar/android/login/PasswordControllerImpl.java

...ar/android/privategroup/list/GroupListControllerImpl.java

...briarproject/briar/android/settings/SettingsFragment.java

...oject/briar/android/sharing/InvitationControllerImpl.java

...ject/briar/android/threaded/ThreadListControllerImpl.java