remove the notion of "root path"; support mixed flash types (do not merge)

Remove the wacky notion of "roots" and "root paths" (those things that
look like "FOO:some/path" instead of just "/foo/some/path").  Let each
device specify its own table of available partitions and how to mount
them (needed for devices that use both MTD/yaffs2 and EMMC/ext4
partitions).

Change-Id: I18b0a572a71c5e087e0b7ae11b1774388339bfd1

Android.mk

@@ -15,8 +15,6 @@ LOCAL_SRC_FILES := \
     verifier.c \
     encryptedfs_provisioning.c
 
-LOCAL_SRC_FILES += test_roots.c
-
 LOCAL_MODULE := recovery
 
 LOCAL_FORCE_STATIC_EXECUTABLE := true
@@ -37,10 +35,13 @@ ifeq ($(TARGET_RECOVERY_UI_LIB),)
 else
   LOCAL_STATIC_LIBRARIES += $(TARGET_RECOVERY_UI_LIB)
 endif
+LOCAL_STATIC_LIBRARIES += libext4_utils libz
 LOCAL_STATIC_LIBRARIES += libminzip libunz libmtdutils libmincrypt
 LOCAL_STATIC_LIBRARIES += libminui libpixelflinger_static libpng libcutils
 LOCAL_STATIC_LIBRARIES += libstdc++ libc
 
+LOCAL_C_INCLUDES += system/extras/ext4_utils
+
 include $(BUILD_EXECUTABLE)