Add Android.mk for building in ROMs

Android.mk is needed to build F-Droid as part of other ROMs. A ROM would
have to emulate the .gitmodules with repo.

Note: the build will fail until AndroidPinning pulls a trivial fix for
      super(null). There is also a layout bug that is fixed by the next
      commit.

Android.mk

@@ -0,0 +1,23 @@
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_PACKAGE_NAME := F-Droid
+LOCAL_CERTIFICATE := platform
+LOCAL_MODULE_TAGS := optional
+LOCAL_SRC_FILES := \
+  $(call all-java-files-under, src) \
+  $(call all-java-files-under, extern/MemorizingTrustManager/src) \
+  $(call all-java-files-under, extern/AndroidPinning/src) \
+  $(call all-java-files-under, extern/UniversalImageLoader/library/src )
+
+res_dirs = res extern/MemorizingTrustManager/res extern/AndroidPinning/res
+LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/, $(res_dirs))
+
+LOCAL_STATIC_JAVA_LIBRARIES += android-support-v4
+
+LOCAL_AAPT_FLAGS := --auto-add-overlay
+LOCAL_AAPT_FLAGS += --extra-packages org.fdroid.fdroid:de.duenndns.ssl:org.thoughtcrime.ssl.pinning
+
+LOCAL_PRIVILEGED_MODULE := true
+include $(BUILD_PACKAGE)
+