Add mono switch, live waveform, and WAV cue markers (1.3.0-alpha)

- WavRecorder: optional mono, waveform envelope, cue/adtl marker chunks
- WaveformView: scrolling waveform with red clipped columns
- Marker + MarkerStore; Mark button with label dialog
- PlayerActivity: marker chips that seek; shared seekTo
- InsetsHelper: keep UI clear of status bar/notch and nav bar
- Bump to 1.3.0-alpha (versionCode 4)

1 files changed, 31 insertions, 0 deletions

diff --git a/app/src/main/res/layout/activity_player.xml b/app/src/main/res/layout/activity_player.xml
index 479efa9..67f5284 100644
--- a/app/src/main/res/layout/activity_player.xml
+++ b/app/src/main/res/layout/activity_player.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/root"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@color/background"
@@ -74,6 +75,36 @@
                 android:text="@string/player_speed_1x" />
         </LinearLayout>
 
+        <LinearLayout
+            android:id="@+id/markersSection"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="14dp"
+            android:orientation="vertical"
+            android:visibility="gone">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/markers_title"
+                android:textColor="@color/text_primary"
+                android:textSize="15sp"
+                android:textStyle="bold" />
+
+            <HorizontalScrollView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="6dp"
+                android:scrollbars="none">
+
+                <LinearLayout
+                    android:id="@+id/markersContainer"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal" />
+            </HorizontalScrollView>
+        </LinearLayout>
+
         <View
             android:layout_width="match_parent"
             android:layout_height="1dp"