Update targetSdkVersion to 34

[esensar]

There are 2 known issues with this update:

• Max font scaling does not look well in the PagerTabStrip
• Not sure if caused by the update, updating file linked to the note sometimes fails with SecurityException

No other changes from these lists affects this app:

• https://developer.android.com/about/versions/14/behavior-changes-all
• https://developer.android.com/about/versions/14/behavior-changes-14

This also fixes a crash when widget checklist is empty.

[tibbi]

looks good, thanks