Enable PDF files in preview pane (#9088)

## Summary of the Pull Request
This PR enables user to preview PDF files in the Explorer preview pane
and in Outlook. 

**What is this about:**
Windows does not support out of the box experience for previewing PDF
files in the preview pane. Users need to install third-party software
like Adobe Acrobat reader. The PdfPreviewHandler module enbales the user
to preview PDF files.

**How does someone test / validate:** 
Run the installer, open Explorer and select a PDF file, enable the
preview pane. Maybe need to remove third-party PDF software.

## Quality Checklist

- [X] **Linked issue:** #3548
- [ ] **Communication:** I've discussed this with core contributors in the issue. 
- [X] **Tests:** Added/updated and all pass
- [X] **Installer:** Added/updated and all pass
- [X] **Localization:** All end user facing strings can be localized
- [ ] **Docs:** Added/ updated
- [x] **Binaries:** Any new files are added to WXS / YML
   - [ ] No new binaries
   - [x] YML for signing
   - [x] WXS for installer

installer/MSIX/appxmanifest.xml

@@ -79,11 +79,20 @@
             <desktop2:DesktopPreviewHandler Clsid="74619BDA-A66B-451D-864C-A7726F5FE650"/>
           </uap3:FileTypeAssociation>
         </uap:Extension>
+        <uap:Extension Category="windows.fileTypeAssociation">
+          <uap3:FileTypeAssociation Name="pdfpreviewhandler" desktop2:AllowSilentDefaultTakeOver="true">
+            <uap:SupportedFileTypes>
+              <uap:FileType>.pdf</uap:FileType>
+            </uap:SupportedFileTypes>
+            <desktop2:DesktopPreviewHandler Clsid="4F6D533B-4185-43A6-AD75-9B20034B14CA"/>
+          </uap3:FileTypeAssociation>
+        </uap:Extension>
         <com:Extension Category="windows.comServer">
           <com:ComServer>
             <com:SurrogateServer DisplayName="Preview Handler" AppId="E39A92FE-D89A-417B-9B9D-F0B6BD564B36" SystemSurrogate="PreviewHost">
               <com:Class Id="74619BDA-A66B-451D-864C-A7726F5FE650" Path="modules\powerpreview.dll" ThreadingModel="Both"/>
               <com:Class Id="E0907A95-6F9A-4D1B-A97A-7D9D2648881E" Path="modules\powerpreview.dll" ThreadingModel="Both"/>
+              <com:Class Id="4F6D533B-4185-43A6-AD75-9B20034B14CA" Path="modules\powerpreview.dll" ThreadingModel="Both"/>
             </com:SurrogateServer>
           </com:ComServer>
         </com:Extension>