Disable native coverage for libinput_tests and inputflinger_tests.

These tests fail to build for coverage when Rust host coverage is
enabled. This is a temporary workaround until the underlying issue is
resolved.

Bug: 338242594
Bug: 330591720
Test: m libinput_tests CLANG_COVERAGE=true NATIVE_COVERAGE_PATHS='*'
Test: m inputflinger_tests CLANG_COVERAGE=true NATIVE_COVERAGE_PATHS='*'
Merged-In: Idf82d31ce8a7078c3502b7bcb7c959177a1bbe4e
Change-Id: Ibe21b560228f6ca3f8acd61bff1763492428fe29