Set the appropriate deps property for the soong generated fs modules

This change:
- Adds a pre-deps bottom-up mutator that sets the appropriate deps
  properties for the soong generate filesystem partition modules
- Makes `installInSysem` more genenric, so that it can be used for other
  partitions
- Introduces `AppendDepsEntries` method in `android.PackagingBase` to
  utilize it in the aforementioned mutator
- Modifies `fsDeps` from a 1D slice to a map (of partition to deps slice)

Test: m nothing --no-skip-soong-tests
Bug: 372771060
Change-Id: Ic251993d1d4c1caca544c5cebcaf29afd749da9e
diff --git a/android/neverallow_test.go b/android/neverallow_test.go
index 192c924..caec8c7 100644
--- a/android/neverallow_test.go
+++ b/android/neverallow_test.go
@@ -359,6 +359,21 @@
 			`headers_only can only be used for generating framework-minus-apex headers for non-updatable modules`,
 		},
 	},
+	// Test for the rule restricting use of is_auto_generated
+	{
+		name: `"is_auto_generated" outside allowed directory`,
+		fs: map[string][]byte{
+			"a/b/Android.bp": []byte(`
+				filesystem {
+					name: "baaz",
+					is_auto_generated: true,
+				}
+			`),
+		},
+		expectedErrors: []string{
+			`is_auto_generated property is only allowed for filesystem modules in build/soong/fsgen directory`,
+		},
+	},
 }
 
 var prepareForNeverAllowTest = GroupFixturePreparers(
@@ -367,6 +382,7 @@
 		ctx.RegisterModuleType("java_library", newMockJavaLibraryModule)
 		ctx.RegisterModuleType("java_library_host", newMockJavaLibraryModule)
 		ctx.RegisterModuleType("java_device_for_host", newMockJavaLibraryModule)
+		ctx.RegisterModuleType("filesystem", newMockFilesystemModule)
 	}),
 )