Allow target to specify LOCAL_PREFER_INTEGRITY

The option will:
 - Produce APK with uncompressed dex
 - Declare to prefer integrity in manifest

Test: unzip -vl, dex compression looks correct with the option provided
      or not.
Test: similarly, aapt dump correct attribute
Bug: None

Change-Id: I16b9a37255150c2ad84af84087dfabb536a3b07a

core/android_manifest.mk

@@ -71,6 +71,11 @@ endif
 ifeq ($(LOCAL_PRIVATE_PLATFORM_APIS),true)
     my_manifest_fixer_flags += --uses-non-sdk-api
 endif
+
+ifeq (true,$(LOCAL_PREFER_INTEGRITY))
+    my_manifest_fixer_flags += --prefer-integrity
+endif
+
 $(fixed_android_manifest): PRIVATE_MANIFEST_FIXER_FLAGS := $(my_manifest_fixer_flags)
 # These two libs are added as optional dependencies (<uses-library> with
 # android:required set to false). This is because they haven't existed in pre-P

core/clear_vars.mk

@@ -213,6 +213,7 @@ LOCAL_PREBUILT_MODULE_FILE:=
 LOCAL_PREBUILT_OBJ_FILES:=
 LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES:=
 LOCAL_PREBUILT_STRIP_COMMENTS:=
+LOCAL_PREFER_INTEGRITY:=
 LOCAL_PRESUBMIT_DISABLED:=
 LOCAL_PRIVATE_PLATFORM_APIS:=
 LOCAL_PRIVILEGED_MODULE:=

core/dex_preopt_odex_install.mk

@@ -3,6 +3,12 @@
 # Output variables: LOCAL_DEX_PREOPT, LOCAL_UNCOMPRESS_DEX, built_odex,
 #                   dexpreopt_boot_jar_module
 
+ifeq (true,$(LOCAL_PREFER_INTEGRITY))
+  LOCAL_UNCOMPRESS_DEX := true
+else
+  LOCAL_UNCOMPRESS_DEX :=
+endif
+
 # We explicitly uncompress APKs of privileged apps, and used by
 # privileged apps
 ifneq (true,$(DONT_UNCOMPRESS_PRIV_APPS_DEXS))