PdfPageImageObject Bitmap Color Channel Issue

	The Android Bitmap ARGB_8888 which we support for PdfPageImageObject
stores the color channel in the native layer as RGBA and the Pdfium expects
the Bitmap color channel to be BGRA which resulted in different image content
being rendered. This CL implements RGBA to BGRA on addPageObject and vice-versa
on getPageObjects.

Bug: 401988277
Test: CTS test for data consistency and manual testing on test app.
Flag: EXEMPT (401988277)
Change-Id: Ic08d822c673199fd8ea4045015045b1400e4cc8c
4 files changed