Switch to the source build of JavaPoet.

Bug: 246670786
Test: presubmit
Change-Id: If435b74fd09964128fb1a18130e3d2a2af92370d
diff --git a/Android.mk b/Android.mk
index c842c5e..c1ac6bb 100644
--- a/Android.mk
+++ b/Android.mk
@@ -148,7 +148,7 @@
 
 LOCAL_ANNOTATION_PROCESSORS := \
 	auto_value_plugin \
-	javapoet-prebuilt-jar \
+	javapoet \
 	dialer-dagger2 \
 	dialer-dagger2-compiler \
 	dialer-dagger2-producers \
@@ -535,7 +535,7 @@
 LOCAL_STATIC_JAVA_LIBRARIES := \
 	dialer-guava \
 	dialer-dagger2 \
-	javapoet-prebuilt-jar \
+	javapoet \
 	auto_service_annotations \
 	auto_common \
 	dialer-javax-annotation-api \