Closes #7474: API for counting recently used PWAs

[grigoryk]

Skipped adding tests for the shortcut manager class, as they'd be even more useless than the manifest storage tests. Currently, we're not actually exercising a storage layer, which android docs seem to advise against due to a likely sqlite version mismatch (unless you run your tests on-device, which is rather slow).

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Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues closed by this pull request are added to the milestone of the version currently in development.
• Breaking Changes: If this is a breaking change, please push a draft PR on Reference Browser to address the breaking issues.

[grigoryk]

bors r=NotWoods

[bors]

Build failed (retrying...):

• complete-push

[bors]

Build failed:

• complete-push

[grigoryk]

on the latest bors attempt:

• browser-engine-system is a network failure;
• ui-browser and ui-glean are the same error (can't load glean) (and unrelated to this PR):

java.lang.ExceptionInInitializerError

     FATAL EXCEPTION: GleanAPIPool
Process: org.mozilla.samples.browser, PID: 6204
java.lang.ExceptionInInitializerError
	at mozilla.telemetry.glean.GleanInternalAPI$initialize$1.invokeSuspend(Glean.kt:151)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
	at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.IllegalStateException: Glean functionality not available
	at mozilla.telemetry.glean.rust.LibGleanFFI$Companion$INSTANCE$1.invoke(LibGleanFFI.kt:79)
	at mozilla.telemetry.glean.rust.LibGleanFFI$Companion$INSTANCE$1.invoke(LibGleanFFI.kt:67)
	at java.lang.reflect.Proxy.invoke(Proxy.java:397)
	at $Proxy2.glean_new_ping_type(Unknown Source)
	at mozilla.telemetry.glean.private.PingType.<init>(PingType.kt:54)
	at mozilla.telemetry.glean.GleanMetrics.Pings.<clinit>(Pings.kt:52)
	... 10 more
Caused by: java.lang.UnsatisfiedLinkError: Unable to load library 'glean_ffi':
dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
Native library (android-x86/libglean_ffi.so) not found in resource path (.)
	at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:302)
	at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:455)
	at com.sun.jna.Library$Handler.<init>(Library.java:179)
	at com.sun.jna.Native.load(Native.java:596)
	at com.sun.jna.Native.load(Native.java:570)
	at mozilla.telemetry.glean.rust.LibGleanFFI$Companion.<clinit>(LibGleanFFI.kt:71)
	at mozilla.telemetry.glean.rust.LibGleanFFI.<clinit>(LibGleanFFI.kt)
	... 12 more
	Suppressed: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
		at com.sun.jna.Native.open(Native Method)
		at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:191)
		... 18 more
	Suppressed: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
		at com.sun.jna.Native.open(Native Method)
		at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:204)
		... 18 more
	Suppressed: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "stderr" referenced by "libglean_ffi.so"...
		at java.lang.Runtime.loadLibrary(Runtime.java:371)
		at java.lang.System.loadLibrary(System.java:989)
		at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:218)
		... 18 more
	Suppressed: java.io.IOException: Native library (android-x86/libglean_ffi.so) not found in resource path (.)
		at com.sun.jna.Native.extractFromResourcePath(Native.java:1089)
		at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:276)
		... 18 more

[grigoryk]

bors retry

[bors]

Build succeeded:

• complete-push