Honor PreventInstall for APKs and dexpreopt files

Native coverage builds create a second variant of APKs and set
PreventInstall on the non-coverage variant.  Skip calling
ctx.InstallFile for APKs and in dexpreopt when PreventInstall
is set.

Fixes: 205865567
Test: m EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true CLANG_COVERAGE=true NATIVE_COVERAGE_PATHS="*" NATIVE_COVERAGE_EXCLUDE_PATHS="art bionic/libc device external/compiler-rt external/clang external/llvm external/swiftshader/third_party/llvm-10.0"
Change-Id: I9e38ac737315db12475e8f9bfb3e0e7c0327fc06