Switch LayoutLib to Java 8

The main build hasn't swtiched to java 8, but lambdas are already used
in layoutlib. This fixes the build break.

(cherry picked from commit 7914e4ca03)

Change-Id: Ice5741dcb8b93faf739a3c21f2ed8be95f92ad08

tools/layoutlib/Android.mk

@@ -16,6 +16,8 @@
 LOCAL_PATH := $(my-dir)
 include $(CLEAR_VARS)
 
+LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+
 #
 # Define rules to build temp_layoutlib.jar, which contains a subset of
 # the classes in framework.jar.  The layoutlib_create tool is used to

tools/layoutlib/bridge/Android.mk

@@ -18,6 +18,7 @@ include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := $(call all-java-files-under,src)
 LOCAL_JAVA_RESOURCE_DIRS := resources
+LOCAL_JAVA_LANGUAGE_VERSION := 1.8
 
 LOCAL_JAVA_LIBRARIES := \
 	layoutlib_api-prebuilt \

tools/layoutlib/bridge/tests/Android.mk

@@ -16,6 +16,8 @@ LOCAL_PATH := $(call my-dir)
 
 include $(CLEAR_VARS)
 
+LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+
 # Only compile source java files in this lib.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 LOCAL_JAVA_RESOURCE_DIRS := res

tools/layoutlib/create/Android.mk

@@ -16,6 +16,8 @@
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
+LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+
 LOCAL_SRC_FILES := $(call all-java-files-under,src)
 
 LOCAL_JAR_MANIFEST := manifest.txt

tools/layoutlib/create/tests/Android.mk

@@ -15,6 +15,8 @@
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
+LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+
 # Only compile source java files in this lib.
 LOCAL_SRC_FILES := $(call all-java-files-under, com)