[FEATURE] User profile restore on same device

[chrismclarke]

What?
User profile restore feature added in #2671 enables restore for signed in users when using a device with a different device id.
Depending on how device IDs are generated, this may not always guarantee users can restore a previous account on the same device after clearing cache or reinstall (dependent on whether particular device and android version generates per-device IDs, or per-app IDs, or per-installation IDs)

An alternate solution would be required to guarantee users can restore profile on the same device

How?
Likely either remove restriction that checks for different device ID for restorable profiles (and include better check to see whether the server data is different), or store a device backup in an external directory that persists post uninstall

Other details
May also need to consider case where post-reinstall on device with same ID data sync overwrites the server data that would otherwise be restored.