gatekeeper: scudo: Increase heap

Storage requires a ~4K buffer to set the pin.  Increase the heap to
accomodate when using scudo (4x overhead of dlmalloc).

Bug: 272705599
Test: adb shell locksettings set-password 1234567890
Change-Id: Ifbde0d6359f39080e671ee03dffb872b46160790
1 file changed