[FIX] web: backport mobile OS detection support

This commit backports the mobile OS detection support, and specifically
Android & iOS one to allow more specific targeting of edge cases (i.e.
disabling native date picker in the mobile iOS app only).

opw-2613810

closes odoo/odoo#75455

Related: odoo/enterprise#20402
Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com>