Adjust test payload sizes based on API level for APF ping tests

Modified testPrefilledMemorySlotsV4() and testDropPingReply() to use a
payload size of 4 for devices with first API level 34 and below, and a
payload size 68 for devices with first API level 35 and above.

Test: TH
Change-Id: Iee6981de164d1fbcf2788e34723149e5e8d46c56
1 file changed