Do not allow the user to take a picture if GPS position isn't precise enough

[overflorian]

If the GPS position is not precise enough (>10m), then the user should NOT be able to take a picture / begin a sequence.

In this case,

1. change the button for the "GPS fixed" icon coloured in red #ea4335ff

2. a snackbar should display the warning icon, the message in bold "Mauvaise précision de la localisation GPS" followed with "Placez-vous en extérieur et patientez". This message should be displayed until the position is precise enough (not possible to discard it).

Inspired by the Mapillary app:

3. a specific mention of the precision distance should be added (only displayed in this mode, not when the fix is not available nor when the precision is good enough), using the error icon with the distance in meters

Exception

When a sequence is already launched, it is possible that

• the GPS signal precision decrease and becomes >10m. In this case, do NOT stop the sequence. Instead, warn the user by displaying the location precision, as specified in 3.
• the GPS signal gets lost. Therefore, the picture has no geolocation at all. In this case, STOP the sequence and display a snackbar with the message in bold "Localisation GPS perdue" followed with "Capture des photos interrompue". This snackbar should be displayed permanently, unless the user click on the CLOSE button or elsewhere on the screen, as specified in the doc

[OtterWays]

On Android, a snackbar should display momentarily and cannot remain permanently on the screen. It's better to use an alert dialog which is more suitable for informing the user of an important event. An alert dialog can remain displayed for as long as necessary.