Remove api_files property from java_api_library

java_api_contribution provides api_surface information, but files
directly passed to java_api_library do not possess such information.
Currently, the api surface is assumed via naming convention for api
files passed via api_files property, but this is fragile.

This change removes the api_files property from java_api_library and
enforce all api files to be passed via java_api_contribution

Test: m nothing --build-from-text-stub
Bug: 300964421
Change-Id: If01d9ed978fe469d4ee0d685582a51629ebecc56
diff --git a/java/java_test.go b/java/java_test.go
index 2ee05ec..ec6be5c 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -1885,7 +1885,6 @@
 			name: "bar2",
 			api_surface: "system",
 			api_contributions: ["foo1", "foo2"],
-			api_files: ["api1/current.txt", "api2/current.txt"]
 		}
 		`,
 		map[string][]byte{
@@ -1903,7 +1902,7 @@
 		},
 		{
 			moduleName:         "bar2",
-			sourceTextFileDirs: []string{"a/current.txt", "b/current.txt", "api1/current.txt", "api2/current.txt"},
+			sourceTextFileDirs: []string{"a/current.txt", "b/current.txt"},
 		},
 	}
 	for _, c := range testcases {
@@ -1975,7 +1974,6 @@
 			api_surface: "system",
 			defaults:["baz1", "baz2"],
 			api_contributions: ["foo4"],
-			api_files: ["api1/current.txt", "api2/current.txt"]
 		}
 		`,
 		map[string][]byte{
@@ -2000,7 +1998,7 @@
 		{
 			moduleName: "bar3",
 			// API text files need to be sorted from the narrower api scope to the wider api scope
-			sourceTextFileDirs: []string{"a/current.txt", "b/current.txt", "api1/current.txt", "api2/current.txt", "c/system-current.txt", "d/system-current.txt"},
+			sourceTextFileDirs: []string{"a/current.txt", "b/current.txt", "c/system-current.txt", "d/system-current.txt"},
 		},
 	}
 	for _, c := range testcases {
@@ -2265,29 +2263,6 @@
 	android.AssertStringDoesContain(t, "Command expected to contain full_api_surface_stub output jar", manifestCommand, "lib1.jar")
 }
 
-func TestJavaApiLibraryFilegroupInput(t *testing.T) {
-	ctx, _ := testJavaWithFS(t, `
-	    filegroup {
-			name: "default_current.txt",
-			srcs: ["current.txt"],
-		}
-
-		java_api_library {
-			name: "foo",
-			api_files: [":default_current.txt"],
-		}
-		`,
-		map[string][]byte{
-			"current.txt": nil,
-		})
-
-	m := ctx.ModuleForTests("foo", "android_common")
-	outputs := fmt.Sprint(m.AllOutputs())
-	if !strings.Contains(outputs, "foo/foo.jar") {
-		t.Errorf("Module output does not contain expected jar %s", "foo/foo.jar")
-	}
-}
-
 func TestTradefedOptions(t *testing.T) {
 	result := PrepareForTestWithJavaBuildComponents.RunTestWithBp(t, `
 java_test_host {