Fix testGetUserMinAspectRatioEntry for both tablets and foldables

Tabelts and foldables now have different aspect ratio values in their
config, so we need to test the devices separately as we shouldnt test for
values that are not in the config of the device the test is run on.

Fixes: 302155585
Test: atest SettingsUnitTests:UserAspectRatioManagerTest
Change-Id: I78fa3020501a4be992bb90fea16a6fec4f37594b