adjust jpeg cache size to allow work on larger displays #4273

Job	Run time
Firmware (universal, debuglink)	4m 0s
Firmware (btconly, debuglink)	3m 51s
Emulator (universal, debuglink, x86_64, noasan)	3m 7s
Emulator arm	0s
Emulator (btconly, debuglink, x86_64, noasan)	3m 3s
Upgrade test (noasan)	4m 6s
Device test (universal, noasan)	7m 27s
Device test (btconly, noasan)	4m 24s
HWI test	0s
Upload emulator binaries	0s
UI diff from main branch	2m 21s
	32m 19s

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