RESTRICT AUTOMERGE Validate permission tree size on permission update Bug: 242537498 Test: atest PermissionMemoryFootprintTest Change-Id: I15343e84c1802d6b89249106263319a6539fa73b (cherry picked from commit 973c67f7fc5d1321ff38e861dfe256a2877af5f0) Merged-In: I15343e84c1802d6b89249106263319a6539fa73b