Update protobuf library from 2.3 to 2.6.

Change-Id: I02d308b01f635307dbb63ea9610db2e56eb1f31b
diff --git a/core/binary.mk b/core/binary.mk
index 752a5c3..e16b736 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -556,22 +556,12 @@
 my_c_includes += external/protobuf/src $(proto_generated_cc_sources_dir)
 my_cflags += -DGOOGLE_PROTOBUF_NO_RTTI
 ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),full)
-    ifneq ($(filter libprotobuf-cpp-2.3.0-full,$(my_static_libraries)),)
-        $(warning Stripping unneeded dependency on libprotobuf-cpp-2.3.0-full in $(LOCAL_MODULE))
-        my_static_libraries := $(filter-out libprotobuf-cpp-2.3.0-full,$(my_static_libraries))
-    endif
-
     ifdef LOCAL_SDK_VERSION
         my_static_libraries += libprotobuf-cpp-full
     else
         my_shared_libraries += libprotobuf-cpp-full
     endif
 else
-    ifneq ($(filter libprotobuf-cpp-2.3.0-lite,$(my_static_libraries)),)
-        $(warning Stripping unneeded dependency on libprotobuf-cpp-2.3.0-lite in $(LOCAL_MODULE))
-        my_static_libraries := $(filter-out libprotobuf-cpp-2.3.0-lite,$(my_static_libraries))
-    endif
-
     ifdef LOCAL_SDK_VERSION
         my_static_libraries += libprotobuf-cpp-lite
     else
diff --git a/core/host_java_library_common.mk b/core/host_java_library_common.mk
index a675a84..cd9e679 100644
--- a/core/host_java_library_common.mk
+++ b/core/host_java_library_common.mk
@@ -29,23 +29,11 @@
 proto_sources := $(filter %.proto,$(LOCAL_SRC_FILES))
 ifneq ($(proto_sources),)
 ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),micro)
-    ifneq ($(filter host-libprotobuf-java-2.3.0-micro,$(LOCAL_JAVA_LIBRARIES)),)
-        $(warning Stripping unneeded dependency on host-libprotobuf-java-2.3.0-micro in $(LOCAL_MODULE))
-        LOCAL_JAVA_LIBRARIES := $(filter-out host-libprotobuf-java-2.3.0-micro,$(LOCAL_JAVA_LIBRARIES))
-    endif
     LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-micro
 else
   ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nano)
-    ifneq ($(filter host-libprotobuf-java-2.3.0-nano,$(LOCAL_JAVA_LIBRARIES)),)
-        $(warning Stripping unneeded dependency on host-libprotobuf-java-2.3.0-nano in $(LOCAL_MODULE))
-        LOCAL_JAVA_LIBRARIES := $(filter-out host-libprotobuf-java-2.3.0-nano,$(LOCAL_JAVA_LIBRARIES))
-    endif
     LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-nano
   else
-    ifneq ($(filter host-libprotobuf-java-2.3.0-lite,$(LOCAL_JAVA_LIBRARIES)),)
-        $(warning Stripping unneeded dependency on host-libprotobuf-java-2.3.0-lite in $(LOCAL_MODULE))
-        LOCAL_JAVA_LIBRARIES := $(filter-out host-libprotobuf-java-2.3.0-lite,$(LOCAL_JAVA_LIBRARIES))
-    endif
     LOCAL_JAVA_LIBRARIES += host-libprotobuf-java-lite
   endif
 endif
diff --git a/core/java.mk b/core/java.mk
index 98d5138..bdba680 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -42,23 +42,11 @@
 proto_sources := $(filter %.proto,$(LOCAL_SRC_FILES))
 ifneq ($(proto_sources),)
 ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),micro)
-    ifneq ($(filter libprotobuf-java-2.3.0-micro,$(LOCAL_STATIC_JAVA_LIBRARIES)),)
-        $(warning Stripping unneeded dependency on libprotobuf-java-2.3.0-micro in $(LOCAL_MODULE))
-        LOCAL_STATIC_JAVA_LIBRARIES := $(filter-out libprotobuf-java-2.3.0-micro,$(LOCAL_STATIC_JAVA_LIBRARIES))
-    endif
     LOCAL_STATIC_JAVA_LIBRARIES += libprotobuf-java-micro
 else
   ifeq ($(LOCAL_PROTOC_OPTIMIZE_TYPE),nano)
-    ifneq ($(filter libprotobuf-java-2.3.0-nano,$(LOCAL_STATIC_JAVA_LIBRARIES)),)
-        $(warning Stripping unneeded dependency on libprotobuf-java-2.3.0-nano in $(LOCAL_MODULE))
-        LOCAL_STATIC_JAVA_LIBRARIES := $(filter-out libprotobuf-java-2.3.0-nano,$(LOCAL_STATIC_JAVA_LIBRARIES))
-    endif
     LOCAL_STATIC_JAVA_LIBRARIES += libprotobuf-java-nano
   else
-    ifneq ($(filter libprotobuf-java-2.3.0-lite,$(LOCAL_STATIC_JAVA_LIBRARIES)),)
-        $(warning Stripping unneeded dependency on libprotobuf-java-2.3.0-lite in $(LOCAL_MODULE))
-        LOCAL_STATIC_JAVA_LIBRARIES := $(filter-out libprotobuf-java-2.3.0-lite,$(LOCAL_STATIC_JAVA_LIBRARIES))
-    endif
     LOCAL_STATIC_JAVA_LIBRARIES += libprotobuf-java-lite
   endif
 endif