…same media file as in other struct

# Conflicts:
#	Xamarin.Essentials/Platform/Platform.android.cs

…Essentials into feature/Screenshot

…to avoid ambiguieties on uwp.

…Essentials into feature/Screenshot

Context: https://github.com/dotnet/core/blob/79c19c12ab2bc11912551bb0c3025f602cd541d9/Documentation/diagnostics/portable_pdb.md

In doing some performance testing with builds in VS 2019, I noticed:

    115 ms  _ConvertPdbFiles                           1 calls

And looking at files were converted:

    ConvertDebuggingFiles
        Parameters
            Files
                C:\ProgramData\Xamarin\NuGet\xamarin.essentials\1.0.1\lib\monoandroid81\Xamarin.Essentials.pdb
        [Output] ConvertedFiles:
            C:\ProgramData\Xamarin\NuGet\xamarin.essentials\1.0.1\lib\monoandroid81\Xamarin.Essentials.dll

The Xamarin.Essentials NuGet package is shipping a non-portable PDB
file. This is a Windows-specific format that Mono doesn't support.

Xamarin.Android runs a tool called `pdb2mdb` when it encounters a
non-portable PDB file so symbols be converted to something that Mono
can use. If you have `DebugType=full` or `DebugType=pdbonly`,
Xamarin.Android has to do this extra work to convert it.

I see no drawbacks to just use `DebugType=portable` in this project
all the time?

Since Xamarin.Essentials uses sourcelink, I double-checked and they
support portable PDBs:

https://github.com/dotnet/sourcelink#prerequisites-for-net-projects

I sent a similar PR to Xamarin.Forms, shipping since 3.4. I wrote a
bit more detail on symbol files there if you need more info:

xamarin/Xamarin.Forms#4201

…ic cache director and use correct path for file provider. (#789)

* Fixes #745 to return real metrics, not app metrics on display.

* Add using statements to cleanup displays and metrics

…795)

* Check for null MainView

* Use the ActionSendMultiple on android for multi-attachments

* Implement Open File in Launcher.  Fixed #601 & #425

* Add title to open file request for android launcher

* Clean FileBase and AttachmentName. Added documentation.

* Fix encoding

* Remove namesapces that aren' t needed

…Essentials into feature/Screenshot

…ot feature, changed method signature to be compatible with the picker as suggested. Also renamed mediafile to screenshotfile