librecovery: Remove -Wno-unused-parameter and add -Wall.

Test: mmma bootable/recovery
Change-Id: I5598d32bebb9dbda4a183a1502e0b7dc4918392e

Android.mk

@@ -45,7 +45,7 @@ include $(BUILD_STATIC_LIBRARY)
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES := \
     install.cpp
-LOCAL_CFLAGS := -Wno-unused-parameter -Werror
+LOCAL_CFLAGS := -Wall -Werror
 LOCAL_CFLAGS += -DRECOVERY_API_VERSION=$(RECOVERY_API_VERSION)
 
 ifeq ($(AB_OTA_UPDATER),true)

install.cpp

@@ -211,7 +211,7 @@ static int check_newer_ab_build(ZipArchiveHandle zip) {
   return 0;
 }
 
-int update_binary_command(const std::string& path, ZipArchiveHandle zip, int retry_count,
+int update_binary_command(const std::string& path, ZipArchiveHandle zip, int /* retry_count */,
                           int status_fd, std::vector<std::string>* cmd) {
   CHECK(cmd != nullptr);
   int ret = check_newer_ab_build(zip);