Remove eventTime from MotionEntry

EventEntry, the base class for MotionEntry, already has field
'eventTime'. However, MotionEntry was defining its own 'eventTime'.
Remove it.

This was discovered by setting '-Wshadow-all'.
However, setting that flag does not allow having initializer lists where
parameter name matches the field name.

Therefore, avoid "-Wshadow-all" and just turn on some of the additional
checks that it provides.

Bug: 142017994
Test: m sync inputflinger_tests libinput_tests inputflinger_benchmarks StructLayout_test libgui_test inputflinger_benchmarks
Change-Id: I6c62fe4362bac09731c3855537db6bf3b7493ec1