Only send SUSPENSION_CHANGED for changed packages

Additional fix follow up to Ie06df12ff3da6cf209fb3149e6aa80b0e63ce56e.

With the write commit refactor, this was sending unnecessary changed broadcasts.
This fixes it using a real old vs. new equality check, taking into account both
presence and deep object equality. This restricts the broadcasts to only being
sent if the package SuspendParams metadata has actually changed.

Bug: 245426112

Test: atest SuspendPackagesTest
Test: atest android.suspendapps.cts

Change-Id: Ic4287d2a7b1b8ae0779b234e5ccd8a7a0787f265