Convert LauncherPluginLib to soong

Bug: 148896221
Change-Id: I0c09ba2994cf2a8e230aebc51eb52a8acadf8686
diff --git a/Android.bp b/Android.bp
index cb695df..e132854 100644
--- a/Android.bp
+++ b/Android.bp
@@ -47,3 +47,14 @@
     },
     static_libs: ["libprotobuf-java-lite"],
 }
+
+java_library {
+    name: "LauncherPluginLib",
+
+    static_libs: ["PluginCoreLib"],
+
+    srcs: ["src_plugins/**/*.java"],
+
+    sdk_version: "current",
+    min_sdk_version: "28",
+}
diff --git a/Android.mk b/Android.mk
index c066a12..9cfcf17 100644
--- a/Android.mk
+++ b/Android.mk
@@ -17,24 +17,6 @@
 LOCAL_PATH := $(call my-dir)
 
 #
-# Build rule for plugin lib (needed to write a plugin).
-#
-include $(CLEAR_VARS)
-LOCAL_USE_AAPT2 := true
-LOCAL_AAPT2_ONLY := true
-LOCAL_MODULE_TAGS := optional
-LOCAL_STATIC_JAVA_LIBRARIES:= PluginCoreLib
-
-LOCAL_SRC_FILES := \
-    $(call all-java-files-under, src_plugins)
-
-LOCAL_SDK_VERSION := current
-LOCAL_MIN_SDK_VERSION := 28
-LOCAL_MODULE := LauncherPluginLib
-
-include $(BUILD_STATIC_JAVA_LIBRARY)
-
-#
 # Build rule for Launcher3 dependencies lib.
 #
 include $(CLEAR_VARS)