[Android] Assume file system is case sensitive

[lambdageek]

See #54313 (comment) and dotnet/maui#822 (comment)

The code that initializes System.IO.PathInternal.s_isCaseSensitive checks does I/O in the temp folder to check for case sensitivity. This is a startup perf hit on Android where low-end devices may have very slow storage. It also returns results that may be misleading since different paths on Unix may have different filesystems mounted that have different case sensitivity (a common case on Android is ext4 for internal storage and exFAT for the SD card).

We should simply return true here and assume case sensitivity.

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Issue Details

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See #54313 (comment) and dotnet/maui#822 (comment)

The code that initializes System.IO.PathInternal.s_isCaseSensitive checks does I/O in the temp folder to check for case sensitivity. This is a startup perf hit on Android where low-end devices may have very slow storage. It also returns results that may be misleading since different paths on Unix may have different filesystems mounted that have different case sensitivity (a common case on Android is ext4 for internal storage and exFAT for the SD card).

We should simply return true here and assume case sensitivity.

Author:	lambdageek
Assignees:	lambdageek
Labels:	area-System.IO, os-android, tenet-performance
Milestone:	6.0.0