ActivityManagerConstants: use min MCP for TRIM_EMPTY limits

With a high default MCP, it no longer makes sense to use the default
MCP as the trim limit. This could be causing problems on emulators.

Test: lower TRIM_EMPTY_PROCESSES with 1024 default MCP and 32 set MCP
Bug: 276751141
Change-Id: Ia4e0f127078150b0dd0bea17acf22a1ed5304d80
1 file changed