Sandbox all usages of parent app bounds for targetSDK < 35

Sandbox usages missed out from ag/26943456.

Re-enable SizeCompatTests that were skipped before when
insets_decoupled_configuration flag was enabled.

Flag: com.android.window.flags.insets_decoupled_configuration
Bug: 151861875
Fix: 343629056
Fix: 345732224
Fix: 345738998
Test: atest SizeCompatTests
Change-Id: Idd791ad8b39c40238fb4864e42317d82789c3b80