[abelonogov-ld]

Adds an Event storage view to the test app, as the iOS test app has: what the SDK has on disk for this app and mobile key.

Stacked on #408 (tier 3).

The view is a text block under the persistence picker. A summary line, "N log(s), N batch(es) holding N event(s)", is followed by the newest six files. Each line gives the file's kind (log, new, batch), its shortened name, the event count a batch's name holds, its size and its modification time to the second:

Event storage: 1 log(s), 2 batch(es) holding 14 event(s)
log   pending-23b88492…  1.5 MB · 11:43:41
batch ready-v1-4b1aad42… 7 ev · 1.8 MB · 11:43:41
batch ready-v1-b723abc2… 7 ev · 1.8 MB · 11:43:41

• It never opens a file. It reads names, sizes and modification times from the directory listing, so looking cannot take a lock another process's recovery needs.
• It refreshes once a second while the activity is in the foreground, from onResume to onPause. A file that comes and goes within a second, such as a new- log being opened, is never shown.
• The directory comes from the SDK itself. EventDirectory.defaultDirectory is package-private, so a small com.launchdarkly.sdk.android.EventStorageLocation in the test app exposes it, the way EventPersistenceBenchmarkRunner already reaches into the package. The view cannot drift from where the SDK writes.
• A long press copies the directory's path.
• The README describes the section.

Tested on an emulator (API 23):

• After launch the view showed the open log.
• Offline, Fill 3 Batches then Flush showed one 1.5 MB log and two ready- batches of 7 events each. That matches adb shell run-as … ls -l no_backup/com.launchdarkly.events/<key> file for file.
• After delivery it showed 0 logs and 0 batches.

:test-app:assembleDebug builds.

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Note

Overview
The Android test app gains a live Event storage panel under the persistence picker, mirroring the iOS harness.

EventStorageInspector resolves the SDK's on-disk events directory (via new EventStorageLocation, which delegates to package-private EventDirectory.defaultDirectory) and refreshes a monospace summary once per second while the activity is foregrounded. It counts pending- logs and ready- batches, parses event counts from batch filenames, and lists the six newest files using metadata only (no file opens, so recovery locks stay untouched). MainActivity starts/stops polling in onResume/onPause and long-press copies the storage path. Layout adds storage_status; the README documents the behavior.

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