Don't dexpreopt when compile_dex but not installable

Modules shouldn't be dexpreopted and possibly stripped when
compile_dex is set but installable is not set.  This matches the
previous behavior when the dexpreopt rules were in Make.

Bug: 121317615
Test: dexpreopt_test.go
Change-Id: I6f80b7b37a990c475b91aa5d98a19a3baa85eb1b

java/dexpreopt.go

@@ -32,6 +32,7 @@ type dexpreopter struct {
 	isPrivApp     bool
 	isSDKLibrary  bool
 	isTest        bool
+	isInstallable bool
 
 	builtInstalled []string
 }
@@ -74,6 +75,10 @@ func (d *dexpreopter) dexpreoptDisabled(ctx android.ModuleContext) bool {
 		return true
 	}
 
+	if !d.isInstallable {
+		return true
+	}
+
 	// TODO: contains no java code
 
 	return false

java/dexpreopt_test.go

@@ -109,6 +109,16 @@ func TestDexpreoptEnabled(t *testing.T) {
 				}`,
 			enabled: false,
 		},
+		{
+			name: "compile_dex",
+			bp: `
+				java_library {
+					name: "foo",
+					srcs: ["a.java"],
+					compile_dex: true,
+				}`,
+			enabled: false,
+		},
 	}
 
 	for _, test := range tests {

java/java.go

@@ -1326,6 +1326,7 @@ func (j *Module) compile(ctx android.ModuleContext, extraSrcJars ...android.Path
 
 		j.dexJarFile = dexOutputFile
 
+		j.dexpreopter.isInstallable = Bool(j.properties.Installable)
 		dexOutputFile = j.dexpreopt(ctx, dexOutputFile)
 
 		j.maybeStrippedDexJarFile = dexOutputFile