Pass javac flags to errorprone builds

Pass CommonJdkFlags to errorprone builds, which is required for
frameworks/base/layoutlib/create to work correctly.  Unfortunately,
javac and errorprone cannot use the same syntax for the heap size,
javac needs -J-Xmx and errorprone needs -Xmx, so split the heap size
flag out into a separate variable.

Test: m -j RUN_ERROR_PRONE=true javac-check
Change-Id: Icd7f8cf627534fb089ec83e462c060572dd2d20c
diff --git a/java/config/config.go b/java/config/config.go
index 90d0fb5..c6c8fff 100644
--- a/java/config/config.go
+++ b/java/config/config.go
@@ -26,14 +26,17 @@
 var (
 	pctx = android.NewPackageContext("android/soong/java/config")
 
+	JavacHeapSize = "2048M"
+
 	DefaultLibraries = []string{"core-oj", "core-libart", "ext", "framework", "okhttp"}
 )
 
 func init() {
 	pctx.Import("github.com/google/blueprint/bootstrap")
 
+	pctx.StaticVariable("JavacHeapFlags", "-J-Xmx"+JavacHeapSize)
+
 	pctx.StaticVariable("CommonJdkFlags", strings.Join([]string{
-		`-J-Xmx2048M`,
 		`-Xmaxerrs 9999999`,
 		`-encoding UTF-8`,
 		`-sourcepath ""`,
diff --git a/java/config/errorprone.go b/java/config/errorprone.go
index da9b775..ddb9902 100644
--- a/java/config/errorprone.go
+++ b/java/config/errorprone.go
@@ -78,6 +78,8 @@
 		"-Xep:UnusedAnonymousClass:ERROR",
 	}, " "))
 
+	pctx.StaticVariable("ErrorProneHeapFlags", "-Xmx"+JavacHeapSize)
+
 	pctx.StaticVariable("ErrorProneFlags", strings.Join([]string{
 		"com.google.errorprone.ErrorProneCompiler",
 		"-Xdiags:verbose",
@@ -87,11 +89,12 @@
 		"-XDuseStrictMethodClashCheck=true",
 		"-XDuseStructuralMostSpecificResolution=true",
 		"-XDuseGraphInference=true",
-		"-Xmaxwarns 100000",
 		"-XDandroidCompatible=true",
 		"-XepAllErrorsAsWarnings",
 	}, " "))
 
 	pctx.StaticVariable("ErrorProneCmd",
-		"${JavaCmd} -Xbootclasspath/p:${ErrorProneJavacJar} -cp ${ErrorProneJar}:${ErrorProneClasspath} ${ErrorProneFlags} ${ErrorProneChecksError}")
+		"${JavaCmd} ${ErrorProneHeapFlags} -Xbootclasspath/p:${ErrorProneJavacJar} "+
+			"-cp ${ErrorProneJar}:${ErrorProneClasspath} "+
+			"${ErrorProneFlags} ${CommonJdkFlags} ${ErrorProneChecksError}")
 }