[native] Create Flow ExpoBarcodeScanner libdef

Summary:
To use certain types when writing the `BarCodeScanner` integration, it'll probably be useful to have the types available (not entirely necessary, so this can always be abandoned / revisited at a later point if it takes too much time).

Mainly used the types in the [[ https://github.com/flow-typed/flow-typed/blob/master/definitions/npm/expo-barcode-scanner_v6.x.x/flow_v0.69.0-/expo-barcode-scanner_v6.x.x.js | flow-typed ]] repo as inspiration alongside the actual [[ https://github.com/expo/expo/blob/master/packages/expo-barcode-scanner/src/BarCodeScanner.tsx | typescript ]] file from expo. I did only include the methods in the class that I planned to use, but if it's better to include them all I can do that

Depends on D8770

Test Plan: Confirmed that I can now use these types on `native`. Also ran `flow` and no errors were present

Reviewers: atul, ginsu, tomek, varun

Reviewed By: atul

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D8771

native/flow-typed/npm/expo-barcode-scanner_vx.x.x.js

@@ -0,0 +1,150 @@
+// flow-typed signature: 8a42efbaee521b12bea4117c5019bce6
+// flow-typed version: <<STUB>>/expo-barcode-scanner_v12.1.0/flow_v0.182.0
+
+declare module 'expo-barcode-scanner' {
+  declare type StyleObj = 
+    | null
+    | void
+    | number
+    | false
+    | ''
+    | $ReadOnlyArray<StyleObj>
+    | { [name: string]: any, ... };
+
+  declare type ViewStyleProp = StyleObj;
+  declare type ViewProps = {|
+    style?: ViewStyleProp,
+  |};
+
+  declare opaque type BCT$aztec: number;
+  declare opaque type BCT$codebar: number;
+  declare opaque type BCT$code39: number;
+  declare opaque type BCT$code93: number;
+  declare opaque type BCT$code128: number;
+  declare opaque type BCT$code39mod43: number;
+  declare opaque type BCT$datamatrix: number;
+  declare opaque type BCT$ean13: number;
+  declare opaque type BCT$ean8: number;
+  declare opaque type BCT$interleaved2of5: number;
+  declare opaque type BCT$itf14: number;
+  declare opaque type BCT$maxicode: number;
+  declare opaque type BCT$pdf417: number;
+  declare opaque type BCT$rss14: number;
+  declare opaque type BCT$rssexpanded: number;
+  declare opaque type BCT$upc_a: number;
+  declare opaque type BCT$upc_e: number;
+  declare opaque type BCT$upc_ean: number;
+  declare opaque type BCT$qr: number;
+
+  declare export type BarCodeTypeValues =
+    | BCT$aztec
+    | BCT$codebar
+    | BCT$code39
+    | BCT$code93
+    | BCT$code128
+    | BCT$code39mod43
+    | BCT$datamatrix
+    | BCT$ean13
+    | BCT$ean8
+    | BCT$interleaved2of5
+    | BCT$itf14
+    | BCT$maxicode
+    | BCT$pdf417
+    | BCT$rss14
+    | BCT$rssexpanded
+    | BCT$upc_a
+    | BCT$upc_e
+    | BCT$upc_ean
+    | BCT$qr;
+
+  declare export type BarCodeType = $ReadOnly<{|
+    +aztec: BCT$aztec,
+    +codebar: BCT$codebar,
+    +code39: BCT$code39,
+    +code93: BCT$code93,
+    +code128: BCT$code128,
+    +code39mod43: BCT$code39mod43,
+    +datamatrix: BCT$datamatrix,
+    +ean13: BCT$ean13,
+    +ean8: BCT$ean8,
+    +interleaved2of5: BCT$interleaved2of5,
+    +itf14: BCT$itf14,
+    +maxicode: BCT$maxicode,
+    +pdf417: BCT$pdf417,
+    +rss14: BCT$rss14,
+    +rssexpanded: BCT$rssexpanded,
+    +upc_a: BCT$upc_a,
+    +upc_e: BCT$upc_e,
+    +upc_ean: BCT$upc_ean,
+    +qr: BCT$qr,
+  |}>;
+
+  declare export type Type = $ReadOnly<{|
+    +front: string,
+    +back: string,
+  |}>;
+
+  declare export type BarCodePoint = {|
+    +x: number,
+    +y: number,
+  |};
+
+  declare export type BarCodeSize = {|
+    +height: number,
+    +width: number,
+  |};
+
+  declare export type BarCodeBounds = {|
+    +origin: BarCodePoint,
+    +size: BarCodeSize,
+  |};
+
+  declare export type BarCodeScannerResult = {|
+    +type: string,
+    +data: string,
+    +bounds?: BarCodeBounds,
+    +cornerPoints?: $ReadOnlyArray<BarCodePoint>,
+  |};
+
+
+  declare export type BarCodeEvent = {|
+    ...BarCodeScannerResult,
+    +target?: number,
+  |};
+
+  declare export type BarCodeEventCallbackArguments = {|
+    +nativeEvent: BarCodeEvent,
+  |};
+
+  declare export type BarCodeScannedCallback = (params: BarCodeEvent) => void;
+
+  declare export type BarCodeScannerProps = {|
+    +type?: "front" | "back" | number,
+    +barCodeTypes?: $ReadOnlyArray<BarCodeTypeValues>,
+    +onBarCodeScanned?: BarCodeScannedCallback,
+    ...ViewProps,
+  |};
+
+  declare export type PermissionStatus =
+    | 'undetermined'
+    | 'granted'
+    | 'denied';
+
+  declare export type PermissionExpiration = 'never' | number;
+
+  declare export type PermissionResponse = {|
+    +status: PermissionStatus,
+    +expires: PermissionExpiration,
+    +granted: boolean,
+    +canAskAgain: boolean,
+  |};
+
+  declare export class BarCodeScanner extends React$Component<BarCodeScannerProps> {
+    static Constants: $ReadOnly<{|
+      BarCodeType: BarCodeType,
+      Type: Type,
+    |}>;
+
+    static requestPermissionsAsync(): Promise<PermissionResponse>;
+  }
+}