TWRP-ify AOSP code

Pull in most TWRP sources
Stub out partition management code
Make it compile -- probably will not boot
Kind of a mess but have to start somewhere
diff --git a/gui/Android.mk b/gui/Android.mk
new file mode 100644
index 0000000..dd24d8f
--- /dev/null
+++ b/gui/Android.mk
@@ -0,0 +1,70 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+    gui.cpp \
+    resources.cpp \
+    pages.cpp \
+    text.cpp \
+    image.cpp \
+    action.cpp \
+    console.cpp \
+    fill.cpp \
+    button.cpp \
+    checkbox.cpp \
+    fileselector.cpp \
+    progressbar.cpp \
+    animation.cpp \
+    conditional.cpp \
+    slider.cpp \
+    listbox.cpp \
+    keyboard.cpp \
+    input.cpp \
+
+ifneq ($(TWRP_CUSTOM_KEYBOARD),)
+  LOCAL_SRC_FILES += $(TWRP_CUSTOM_KEYBOARD)
+else
+  LOCAL_SRC_FILES += hardwarekeyboard.cpp
+endif
+
+LOCAL_MODULE := libgui
+
+# Use this flag to create a build that simulates threaded actions like installing zips, backups, restores, and wipes for theme testing
+#TWRP_SIMULATE_ACTIONS := true
+ifeq ($(TWRP_SIMULATE_ACTIONS), true)
+LOCAL_CFLAGS += -D_SIMULATE_ACTIONS
+endif
+
+#TWRP_EVENT_LOGGING := true
+ifeq ($(TWRP_EVENT_LOGGING), true)
+LOCAL_CFLAGS += -D_EVENT_LOGGING
+endif
+
+ifneq ($(RECOVERY_SDCARD_ON_DATA),)
+	LOCAL_CFLAGS += -DRECOVERY_SDCARD_ON_DATA
+endif
+
+LOCAL_C_INCLUDES += bionic external/stlport/stlport $(commands_recovery_local_path)/gui/devices/$(DEVICE_RESOLUTION)
+
+include $(BUILD_STATIC_LIBRARY)
+
+# Transfer in the resources for the device
+include $(CLEAR_VARS)
+LOCAL_MODULE := twrp
+LOCAL_MODULE_TAGS := eng
+LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES
+LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/res
+
+TWRP_RES_LOC := $(commands_recovery_local_path)/gui/devices
+TWRP_RES_GEN := $(intermediates)/twrp
+
+$(TWRP_RES_GEN):
+	mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/res/
+	cp -fr $(TWRP_RES_LOC)/common/res/* $(TARGET_RECOVERY_ROOT_OUT)/res/
+	cp -fr $(TWRP_RES_LOC)/$(DEVICE_RESOLUTION)/res/* $(TARGET_RECOVERY_ROOT_OUT)/res/
+	mkdir -p $(TARGET_RECOVERY_ROOT_OUT)/sbin/
+	ln -sf /sbin/busybox $(TARGET_RECOVERY_ROOT_OUT)/sbin/sh
+
+LOCAL_GENERATED_SOURCES := $(TWRP_RES_GEN)
+LOCAL_SRC_FILES := twrp $(TWRP_RES_GEN)
+include $(BUILD_PREBUILT)
\ No newline at end of file