Merge changes from topic "vintf_matrix_sepolicy"

BUILD_NUMBER_FROM_FILE := $$(cat $(OUT_DIR)/build_number.txt)

BUILD_DATETIME_FROM_FILE := $$(cat $(OUT_DIR)/build_date.txt)

# SEPolicy versions

# PLATFORM_SEPOLICY_VERSION is a number of the form "NN.m" with "NN" mapping to

# PLATFORM_SDK_VERSION and "m" as a minor number which allows for SELinux

# changes independent of PLATFORM_SDK_VERSION.  This value will be set to

# 10000.0 to represent tip-of-tree development that is inherently unstable and

# thus designed not to work with any shipping vendor policy.  This is similar in

# spirit to how DEFAULT_APP_TARGET_SDK is set.

# The minor version ('m' component) must be updated every time a platform release

# is made which breaks compatibility with the previous platform sepolicy version,

# not just on every increase in PLATFORM_SDK_VERSION.  The minor version should

# be reset to 0 on every bump of the PLATFORM_SDK_VERSION.

sepolicy_major_vers := 27

sepolicy_minor_vers := 0

ifneq ($(sepolicy_major_vers), $(PLATFORM_SDK_VERSION))

$(error sepolicy_major_version does not match PLATFORM_SDK_VERSION, please update.)

endif

ifneq (REL,$(PLATFORM_VERSION_CODENAME))

    sepolicy_major_vers := 10000

    sepolicy_minor_vers := 0

endif

PLATFORM_SEPOLICY_VERSION := $(join $(addsuffix .,$(sepolicy_major_vers)), $(sepolicy_minor_vers))

sepolicy_major_vers :=

sepolicy_minor_vers :=

# A list of SEPolicy versions, besides PLATFORM_SEPOLICY_VERSION, that the framework supports.

PLATFORM_SEPOLICY_COMPAT_VERSIONS := \

    26.0 \

    27.0

# ###############################################################

# Set up final options.

# ###############################################################