Override maxValue when the initial value is negative or zero

The fuzzer can provide negative values for maxValue. Generally, we would
fix the fuzzer to provide values in a different range. However, this
exact scenario is already handled (partially) in the constructor.

So instead, for simplicity, override this value to something valid (like
1).

Bug: 342826711
Test: FUZZER=inputflinger_touchpad_input_fuzzer; m $FUZZER && ASAN_OPTIONS=detect_odr_violation=0 $ANDROID_HOST_OUT/fuzz/x86_64/$FUZZER/$FUZZER ~/clusterfuzz-testcase-minimized-inputflinger_touchpad_input_fuzzer-5915386382188544
Change-Id: Iee9deec102b577484f66df759a037af72da6a1cd