Fix flaky BroadcastReceiverSystemInfoProvider test

[0xnm]

What does this PR do?

This change fixes a flaky failure:

BroadcastReceiverSystemInfoProviderTest > M read system info W register() {Lollipop}(BatteryStatus, int, int, boolean) > com.datadog.android.core.internal.system.BroadcastReceiverSystemInfoProviderTest.M read system info W register() {Lollipop}(BatteryStatus, int, int, boolean)[6] FAILED
    java.lang.AssertionError at BroadcastReceiverSystemInfoProviderTest.kt:153

It happens because of the Float to Int conversion in the following operations:

> in code (level * 100) / scale
> in test (level * scale) / 100

Since this conversion simply truncates the floating part we may end up loosing too much precision for the final comparison. This change instead of the truncation of the decimal part does a proper rounding.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #1185 (18942b2) into develop (b627277) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #1185      +/-   ##
===========================================
+ Coverage    82.27%   82.31%   +0.04%     
===========================================
  Files          353      353              
  Lines        11793    11794       +1     
  Branches      2006     2006              
===========================================
+ Hits          9702     9708       +6     
+ Misses        1477     1476       -1     
+ Partials       614      610       -4     

Impacted Files	Coverage Δ
...rnal/system/BroadcastReceiverSystemInfoProvider.kt	97.83% <100.00%> (+0.05%)	⬆️
...android/log/internal/logger/TelemetryLogHandler.kt	71.43% <0.00%> (-14.29%)	⬇️
...d/v2/core/internal/storage/FileEventBatchWriter.kt	95.24% <0.00%> (-2.38%)	⬇️
...core/internal/system/DefaultAndroidInfoProvider.kt	83.02% <0.00%> (-1.89%)	⬇️
.../android/rum/internal/monitor/DatadogRumMonitor.kt	92.27% <0.00%> (-1.10%)	⬇️
...n/com/datadog/android/v2/core/SdkInternalLogger.kt	80.77% <0.00%> (ø)
...android/v2/core/internal/DatadogContextProvider.kt	81.54% <0.00%> (ø)
...android/v2/core/internal/net/DataOkHttpUploader.kt	94.52% <0.00%> (ø)
.../android/rum/internal/domain/scope/RumViewScope.kt	95.42% <0.00%> (+0.18%)	⬆️
.../kotlin/com/datadog/android/v2/core/DatadogCore.kt	90.32% <0.00%> (+0.46%)	⬆️
... and 4 more