‘Finding Your Feet’ is too on-the-nose, but has a crackerjack cast that will win you over

For a movie whose title refers to the extremities, “Finding Your Feet” sure is on-the-nose. There is nary a turn of plot that moviegoers of a certain age won’t be able to predict. (If they also happen to enjoy British TV series, they can probably improvise some of the dialogue, too.)And yet this dramedy about middle-class Londoners in their 60s and 70s getting on with life has a genial watchability — even a stubborn relevance — thanks to its crackerjack ensemble cas