Clarification to squeeze effect names and comments

 - isSqueezeEffectAnimatingInwards changed to isMainAnimationRunning since this animation animates both inwards and then outwards.
 - Comments updated to clarify that main animation goes both in and out.
 - Ran ktfmt to format file according to standard

Bug: 399263897
Flag: com.android.systemui.shared.enable_lpp_assist_invocation_effect
Test: manual sanity check - this change shouldn't affect any logic
Change-Id: If9e62b52b9a116ee4e23c8443df077bc4b4b6e3b