Auto-generate dexpreopt boot image module

Add prebuilt modules that installs bootjar dexpreopt files generated by
soong, for example `dexpreopt_bootjar.boot_arm64` installs .art / .oat /
.vdex, etc for the framework boot image ("boot") for primary arch
("arm64").

Bug: 159196136
Test: TH built artifacts noop
Test: Check device boot images are installed
Test: ./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-aosp_arm64.ninja -t browse
Test: Check that generated dependency graph is sane
Test: Check that bootjar dexpreopt bits are listed in `m dump-files`
Change-Id: Ia30b37be9be972c5e28b5840923801ea7237a237