FsCrypt update: support fscrypt policies v1 and v2

This patchset introduces support decryption for Android 11.

In this update we deprecate ext4crypt. To specify the
policy version to use, use TW_USE_FSCRYPT_POLICY := 1 or
TW_USE_FSCRYPT_POLICY := 2. By default policy version will
be set to 2 if this variable is omitted.

Change-Id: I62a29c1bef36c259ec4b11259f71be613d20a112
diff --git a/crypto/fde/Android.mk b/crypto/fde/Android.mk
index f78697f..faf7da8 100755
--- a/crypto/fde/Android.mk
+++ b/crypto/fde/Android.mk
@@ -14,6 +14,8 @@
     LOCAL_CPPFLAGS := -std=c++11
 endif
 
+LOCAL_C_INCLUDES += $(commands_TWRP_local_path)/crypto/fscrypt
+
 ifeq ($(shell test $(PLATFORM_SDK_VERSION) -ge 26; echo $$?),0)
     #8.0 or higher
     LOCAL_C_INCLUDES +=  external/boringssl/src/include