Add support for using profiles for boot images

Added two product flags:
PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE
PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION

If PRODUCT_USE_PROFILE_FOR_BOOT_IMAGE is enabled (default false), a
art profile is used to create the preopted boot image. This profile
is also passed to the runtime in AndroidRuntime.cpp.

The profile is created from the
PRODUCT_DEX_PREOPT_BOOT_IMAGE_PROFILE_LOCATION variable that defaults
to "frameworks/base/boot-image-profile.txt".

Bug: 37966211
Test: make and flash

Change-Id: Ic89cc4c0c4d39aa9726843f5d9c2fb1dedeb7885